diff --git a/wifi/1.4/Android.bp b/wifi/1.4/Android.bp
index b443230..3b94619 100644
--- a/wifi/1.4/Android.bp
+++ b/wifi/1.4/Android.bp
@@ -15,7 +15,6 @@
         "IWifiNanIface.hal",
         "IWifiRttController.hal",
         "IWifiRttControllerEventCallback.hal",
-        "IWifiStaIface.hal",
     ],
     interfaces: [
         "android.hardware.wifi@1.0",
diff --git a/wifi/1.4/IWifiStaIface.hal b/wifi/1.4/IWifiStaIface.hal
deleted file mode 100644
index 8bb0de8..0000000
--- a/wifi/1.4/IWifiStaIface.hal
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * Copyright 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.hardware.wifi@1.4;
-
-import @1.0::WifiStatus;
-import @1.0::MacAddress;
-import @1.0::IWifiStaIface;
-import @1.3::IWifiStaIface;
-
-/**
- * Interface used to represent a single STA iface.
- *
- * IWifiChip.createStaIface() may return a @1.4::IWifiStaIface when supported.
- */
-interface IWifiStaIface extends @1.3::IWifiStaIface {
-    enum StaIfaceCapabilityMask : @1.0::IWifiStaIface.StaIfaceCapabilityMask {
-        STA_6G = 1 << 15,
-    };
-
-    /**
-     * Get the capabilities supported by this STA iface.
-     *
-     * @return status WifiStatus of the operation.
-     *         Possible status codes:
-     *         |WifiStatusCode.SUCCESS|,
-     *         |WifiStatusCode.ERROR_WIFI_IFACE_INVALID|,
-     *         |WifiStatusCode.ERROR_NOT_AVAILABLE|,
-     *         |WifiStatusCode.ERROR_NOT_SUPPORTED|,
-     *         |WifiStatusCode.ERROR_UNKNOWN|
-     * @return capabilities Bitset of |StaIfaceCapabilityMask| values.
-     */
-    getCapabilities_1_4()
-        generates (WifiStatus status, bitfield<StaIfaceCapabilityMask> capabilities);
-};
diff --git a/wifi/1.4/default/hidl_struct_util.cpp b/wifi/1.4/default/hidl_struct_util.cpp
index 45ffdde..4996e35 100644
--- a/wifi/1.4/default/hidl_struct_util.cpp
+++ b/wifi/1.4/default/hidl_struct_util.cpp
@@ -120,8 +120,6 @@
             return HidlStaIfaceCaps::ND_OFFLOAD;
         case WIFI_FEATURE_MKEEP_ALIVE:
             return HidlStaIfaceCaps::KEEP_ALIVE;
-        case WIFI_FEATURE_INFRA_6G:
-            return HidlStaIfaceCaps::STA_6G;
     };
     CHECK(false) << "Unknown legacy feature: " << feature;
     return {};
@@ -394,8 +392,7 @@
           WIFI_FEATURE_IE_WHITELIST, WIFI_FEATURE_SCAN_RAND,
           WIFI_FEATURE_INFRA_5G, WIFI_FEATURE_HOTSPOT, WIFI_FEATURE_PNO,
           WIFI_FEATURE_TDLS, WIFI_FEATURE_TDLS_OFFCHANNEL,
-          WIFI_FEATURE_CONFIG_NDO, WIFI_FEATURE_MKEEP_ALIVE,
-          WIFI_FEATURE_INFRA_6G}) {
+          WIFI_FEATURE_CONFIG_NDO, WIFI_FEATURE_MKEEP_ALIVE}) {
         if (feature & legacy_feature_set) {
             *hidl_caps |= convertLegacyFeatureToHidlStaIfaceCapability(feature);
         }
diff --git a/wifi/1.4/default/hidl_struct_util.h b/wifi/1.4/default/hidl_struct_util.h
index 160870a..d040c1f 100644
--- a/wifi/1.4/default/hidl_struct_util.h
+++ b/wifi/1.4/default/hidl_struct_util.h
@@ -25,7 +25,6 @@
 #include <android/hardware/wifi/1.3/IWifiChip.h>
 #include <android/hardware/wifi/1.3/types.h>
 #include <android/hardware/wifi/1.4/IWifiChipEventCallback.h>
-#include <android/hardware/wifi/1.4/IWifiStaIface.h>
 #include <android/hardware/wifi/1.4/types.h>
 
 #include "wifi_legacy_hal.h"
diff --git a/wifi/1.4/default/wifi_chip.cpp b/wifi/1.4/default/wifi_chip.cpp
index 2b015d3..a70457b 100644
--- a/wifi/1.4/default/wifi_chip.cpp
+++ b/wifi/1.4/default/wifi_chip.cpp
@@ -938,7 +938,8 @@
     return createWifiStatus(WifiStatusCode::SUCCESS);
 }
 
-std::pair<WifiStatus, sp<IWifiStaIface>> WifiChip::createStaIfaceInternal() {
+std::pair<WifiStatus, sp<V1_3::IWifiStaIface>>
+WifiChip::createStaIfaceInternal() {
     if (!canCurrentModeSupportIfaceOfTypeWithCurrentIfaces(IfaceType::STA)) {
         return {createWifiStatus(WifiStatusCode::ERROR_NOT_AVAILABLE), {}};
     }
@@ -962,7 +963,7 @@
     return {createWifiStatus(WifiStatusCode::SUCCESS), getNames(sta_ifaces_)};
 }
 
-std::pair<WifiStatus, sp<IWifiStaIface>> WifiChip::getStaIfaceInternal(
+std::pair<WifiStatus, sp<V1_3::IWifiStaIface>> WifiChip::getStaIfaceInternal(
     const std::string& ifname) {
     const auto iface = findUsingName(sta_ifaces_, ifname);
     if (!iface.get()) {
diff --git a/wifi/1.4/default/wifi_chip.h b/wifi/1.4/default/wifi_chip.h
index c76eabf..3323ade 100644
--- a/wifi/1.4/default/wifi_chip.h
+++ b/wifi/1.4/default/wifi_chip.h
@@ -197,9 +197,9 @@
     std::pair<WifiStatus, sp<IWifiP2pIface>> getP2pIfaceInternal(
         const std::string& ifname);
     WifiStatus removeP2pIfaceInternal(const std::string& ifname);
-    std::pair<WifiStatus, sp<IWifiStaIface>> createStaIfaceInternal();
+    std::pair<WifiStatus, sp<V1_3::IWifiStaIface>> createStaIfaceInternal();
     std::pair<WifiStatus, std::vector<hidl_string>> getStaIfaceNamesInternal();
-    std::pair<WifiStatus, sp<IWifiStaIface>> getStaIfaceInternal(
+    std::pair<WifiStatus, sp<V1_3::IWifiStaIface>> getStaIfaceInternal(
         const std::string& ifname);
     WifiStatus removeStaIfaceInternal(const std::string& ifname);
     std::pair<WifiStatus, sp<V1_0::IWifiRttController>>
diff --git a/wifi/1.4/default/wifi_sta_iface.cpp b/wifi/1.4/default/wifi_sta_iface.cpp
index 68c989d..e2ea6e4 100644
--- a/wifi/1.4/default/wifi_sta_iface.cpp
+++ b/wifi/1.4/default/wifi_sta_iface.cpp
@@ -266,13 +266,6 @@
                            hidl_status_cb);
 }
 
-Return<void> WifiStaIface::getCapabilities_1_4(
-    getCapabilities_cb hidl_status_cb) {
-    return validateAndCall(this, WifiStatusCode::ERROR_WIFI_IFACE_INVALID,
-                           &WifiStaIface::getCapabilitiesInternal_1_4,
-                           hidl_status_cb);
-}
-
 std::pair<WifiStatus, std::string> WifiStaIface::getNameInternal() {
     return {createWifiStatus(WifiStatusCode::SUCCESS), ifname_};
 }
@@ -290,7 +283,26 @@
 }
 
 std::pair<WifiStatus, uint32_t> WifiStaIface::getCapabilitiesInternal() {
-    return {createWifiStatus(WifiStatusCode::ERROR_NOT_SUPPORTED), 0};
+    legacy_hal::wifi_error legacy_status;
+    uint64_t legacy_feature_set;
+    std::tie(legacy_status, legacy_feature_set) =
+        legacy_hal_.lock()->getSupportedFeatureSet(ifname_);
+    if (legacy_status != legacy_hal::WIFI_SUCCESS) {
+        return {createWifiStatusFromLegacyError(legacy_status), 0};
+    }
+    uint32_t legacy_logger_feature_set;
+    std::tie(legacy_status, legacy_logger_feature_set) =
+        legacy_hal_.lock()->getLoggerSupportedFeatureSet(ifname_);
+    if (legacy_status != legacy_hal::WIFI_SUCCESS) {
+        // some devices don't support querying logger feature set
+        legacy_logger_feature_set = 0;
+    }
+    uint32_t hidl_caps;
+    if (!hidl_struct_util::convertLegacyFeaturesToHidlStaCapabilities(
+            legacy_feature_set, legacy_logger_feature_set, &hidl_caps)) {
+        return {createWifiStatus(WifiStatusCode::ERROR_UNKNOWN), 0};
+    }
+    return {createWifiStatus(WifiStatusCode::SUCCESS), hidl_caps};
 }
 
 std::pair<WifiStatus, StaApfPacketFilterCapabilities>
@@ -628,29 +640,6 @@
     return {createWifiStatus(WifiStatusCode::SUCCESS), mac};
 }
 
-std::pair<WifiStatus, uint32_t> WifiStaIface::getCapabilitiesInternal_1_4() {
-    legacy_hal::wifi_error legacy_status;
-    uint64_t legacy_feature_set;
-    std::tie(legacy_status, legacy_feature_set) =
-        legacy_hal_.lock()->getSupportedFeatureSet(ifname_);
-    if (legacy_status != legacy_hal::WIFI_SUCCESS) {
-        return {createWifiStatusFromLegacyError(legacy_status), 0};
-    }
-    uint32_t legacy_logger_feature_set;
-    std::tie(legacy_status, legacy_logger_feature_set) =
-        legacy_hal_.lock()->getLoggerSupportedFeatureSet(ifname_);
-    if (legacy_status != legacy_hal::WIFI_SUCCESS) {
-        // some devices don't support querying logger feature set
-        legacy_logger_feature_set = 0;
-    }
-    uint32_t hidl_caps;
-    if (!hidl_struct_util::convertLegacyFeaturesToHidlStaCapabilities(
-            legacy_feature_set, legacy_logger_feature_set, &hidl_caps)) {
-        return {createWifiStatus(WifiStatusCode::ERROR_UNKNOWN), 0};
-    }
-    return {createWifiStatus(WifiStatusCode::SUCCESS), hidl_caps};
-}
-
 }  // namespace implementation
 }  // namespace V1_4
 }  // namespace wifi
diff --git a/wifi/1.4/default/wifi_sta_iface.h b/wifi/1.4/default/wifi_sta_iface.h
index e85e39d..dee04f2 100644
--- a/wifi/1.4/default/wifi_sta_iface.h
+++ b/wifi/1.4/default/wifi_sta_iface.h
@@ -19,7 +19,7 @@
 
 #include <android-base/macros.h>
 #include <android/hardware/wifi/1.0/IWifiStaIfaceEventCallback.h>
-#include <android/hardware/wifi/1.4/IWifiStaIface.h>
+#include <android/hardware/wifi/1.3/IWifiStaIface.h>
 
 #include "hidl_callback_util.h"
 #include "wifi_iface_util.h"
@@ -35,7 +35,7 @@
 /**
  * HIDL interface object used to control a STA Iface instance.
  */
-class WifiStaIface : public V1_4::IWifiStaIface {
+class WifiStaIface : public V1_3::IWifiStaIface {
    public:
     WifiStaIface(const std::string& ifname,
                  const std::weak_ptr<legacy_hal::WifiLegacyHal> legacy_hal,
@@ -112,8 +112,6 @@
                                setMacAddress_cb hidl_status_cb) override;
     Return<void> getFactoryMacAddress(
         getFactoryMacAddress_cb hidl_status_cb) override;
-    Return<void> getCapabilities_1_4(
-        getCapabilities_1_4_cb hidl_status_cb) override;
 
    private:
     // Corresponding worker functions for the HIDL methods.
@@ -162,7 +160,6 @@
     WifiStatus setMacAddressInternal(const std::array<uint8_t, 6>& mac);
     std::pair<WifiStatus, std::array<uint8_t, 6>>
     getFactoryMacAddressInternal();
-    std::pair<WifiStatus, uint32_t> getCapabilitiesInternal_1_4();
 
     std::string ifname_;
     std::weak_ptr<legacy_hal::WifiLegacyHal> legacy_hal_;
diff --git a/wifi/1.4/vts/functional/wifi_sta_iface_hidl_test.cpp b/wifi/1.4/vts/functional/wifi_sta_iface_hidl_test.cpp
deleted file mode 100644
index ec4b2c9..0000000
--- a/wifi/1.4/vts/functional/wifi_sta_iface_hidl_test.cpp
+++ /dev/null
@@ -1,62 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Staache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <android-base/logging.h>
-
-#include <android/hardware/wifi/1.4/IWifiStaIface.h>
-
-#include <VtsHalHidlTargetTestBase.h>
-
-#include "wifi_hidl_call_util.h"
-#include "wifi_hidl_test_utils.h"
-
-using ::android::sp;
-using ::android::hardware::hidl_array;
-using ::android::hardware::wifi::V1_0::WifiStatus;
-using ::android::hardware::wifi::V1_0::WifiStatusCode;
-using ::android::hardware::wifi::V1_4::IWifiStaIface;
-
-/**
- * Fixture to use for all STA Iface HIDL interface tests.
- */
-class WifiStaIfaceHidlTest : public ::testing::VtsHalHidlTargetTestBase {
-   public:
-    virtual void SetUp() override {
-        wifi_sta_iface_ = IWifiStaIface::castFrom(getWifiStaIface());
-        ASSERT_NE(nullptr, wifi_sta_iface_.get());
-    }
-
-    virtual void TearDown() override { stopWifi(); }
-
-   protected:
-    sp<IWifiStaIface> wifi_sta_iface_;
-};
-
-/*
- * GetCapabilities_1_4
- */
-TEST_F(WifiStaIfaceHidlTest, GetCapabilities_1_4) {
-    configureChipForIfaceType(IfaceType::STA, true);
-
-    const auto& status_and_caps =
-        HIDL_INVOKE(wifi_sta_iface_, getCapabilities_1_4);
-    if (status_and_caps.first.code != WifiStatusCode::SUCCESS) {
-        EXPECT_EQ(WifiStatusCode::ERROR_NOT_SUPPORTED,
-                  status_and_caps.first.code);
-        return;
-    }
-    EXPECT_NE(0u, status_and_caps.second);
-}