diff --git a/wifi/1.0/vts/functional/wifi_sta_iface_hidl_test.cpp b/wifi/1.0/vts/functional/wifi_sta_iface_hidl_test.cpp
index 7db0526..e311c84 100644
--- a/wifi/1.0/vts/functional/wifi_sta_iface_hidl_test.cpp
+++ b/wifi/1.0/vts/functional/wifi_sta_iface_hidl_test.cpp
@@ -260,8 +260,8 @@
 
 /*
  * SetScanningMacOui:
- * Ensures that calls to set scanning MAC OUI will return a success status
- * code.
+ * Ensures that calls to set scanning MAC OUI will return a NOT_SUPPORTED
+ * code since it is now deprecated.
  */
 TEST_P(WifiStaIfaceHidlTest, SetScanningMacOui) {
     if (!isCapabilitySupported(
@@ -271,7 +271,7 @@
     }
     const android::hardware::hidl_array<uint8_t, 3> kOui{
         std::array<uint8_t, 3>{{0x10, 0x22, 0x33}}};
-    EXPECT_EQ(WifiStatusCode::SUCCESS,
+    EXPECT_EQ(WifiStatusCode::ERROR_NOT_SUPPORTED,
               HIDL_INVOKE(wifi_sta_iface_, setScanningMacOui, kOui).code);
 }
 
diff --git a/wifi/1.4/default/wifi_legacy_hal.cpp b/wifi/1.4/default/wifi_legacy_hal.cpp
index f596195..29123bf 100644
--- a/wifi/1.4/default/wifi_legacy_hal.cpp
+++ b/wifi/1.4/default/wifi_legacy_hal.cpp
@@ -801,13 +801,6 @@
         cmd_id, getIfaceHandle(iface_name));
 }
 
-wifi_error WifiLegacyHal::setScanningMacOui(const std::string& iface_name,
-                                            const std::array<uint8_t, 3>& oui) {
-    std::vector<uint8_t> oui_internal(oui.data(), oui.data() + oui.size());
-    return global_func_table_.wifi_set_scanning_mac_oui(
-        getIfaceHandle(iface_name), oui_internal.data());
-}
-
 wifi_error WifiLegacyHal::selectTxPowerScenario(const std::string& iface_name,
                                                 wifi_power_scenario scenario) {
     return global_func_table_.wifi_select_tx_power_scenario(
diff --git a/wifi/1.4/default/wifi_legacy_hal.h b/wifi/1.4/default/wifi_legacy_hal.h
index c697ff9..9964460 100644
--- a/wifi/1.4/default/wifi_legacy_hal.h
+++ b/wifi/1.4/default/wifi_legacy_hal.h
@@ -252,8 +252,6 @@
         const std::array<uint8_t, 6>& dst_address, uint32_t period_in_ms);
     wifi_error stopSendingOffloadedPacket(const std::string& iface_name,
                                           uint32_t cmd_id);
-    wifi_error setScanningMacOui(const std::string& iface_name,
-                                 const std::array<uint8_t, 3>& oui);
     virtual wifi_error selectTxPowerScenario(const std::string& iface_name,
                                              wifi_power_scenario scenario);
     virtual wifi_error resetTxPowerScenario(const std::string& iface_name);
diff --git a/wifi/1.4/default/wifi_sta_iface.cpp b/wifi/1.4/default/wifi_sta_iface.cpp
index e2ea6e4..49f383a 100644
--- a/wifi/1.4/default/wifi_sta_iface.cpp
+++ b/wifi/1.4/default/wifi_sta_iface.cpp
@@ -578,10 +578,9 @@
 }
 
 WifiStatus WifiStaIface::setScanningMacOuiInternal(
-    const std::array<uint8_t, 3>& oui) {
-    legacy_hal::wifi_error legacy_status =
-        legacy_hal_.lock()->setScanningMacOui(ifname_, oui);
-    return createWifiStatusFromLegacyError(legacy_status);
+    const std::array<uint8_t, 3>& /* oui */) {
+    // deprecated.
+    return createWifiStatus(WifiStatusCode::ERROR_NOT_SUPPORTED);
 }
 
 WifiStatus WifiStaIface::startDebugPacketFateMonitoringInternal() {