diff --git a/radio/1.1/Android.bp b/radio/1.1/Android.bp
index a21bb89..32de319 100644
--- a/radio/1.1/Android.bp
+++ b/radio/1.1/Android.bp
@@ -7,6 +7,7 @@
         "IRadio.hal",
         "IRadioIndication.hal",
         "IRadioResponse.hal",
+        "ISap.hal",
     ],
 }
 
@@ -22,6 +23,7 @@
         "android/hardware/radio/1.1/RadioAll.cpp",
         "android/hardware/radio/1.1/RadioIndicationAll.cpp",
         "android/hardware/radio/1.1/RadioResponseAll.cpp",
+        "android/hardware/radio/1.1/SapAll.cpp",
     ],
 }
 
@@ -50,6 +52,11 @@
         "android/hardware/radio/1.1/BnHwRadioResponse.h",
         "android/hardware/radio/1.1/BpHwRadioResponse.h",
         "android/hardware/radio/1.1/BsRadioResponse.h",
+        "android/hardware/radio/1.1/ISap.h",
+        "android/hardware/radio/1.1/IHwSap.h",
+        "android/hardware/radio/1.1/BnHwSap.h",
+        "android/hardware/radio/1.1/BpHwSap.h",
+        "android/hardware/radio/1.1/BsSap.h",
     ],
 }
 
diff --git a/radio/1.1/Android.mk b/radio/1.1/Android.mk
index a26fd52..74ce516 100644
--- a/radio/1.1/Android.mk
+++ b/radio/1.1/Android.mk
@@ -366,6 +366,25 @@
 $(GEN): $(LOCAL_PATH)/IRadioResponse.hal
 	$(transform-generated-source)
 LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build ISap.hal
+#
+GEN := $(intermediates)/android/hardware/radio/V1_1/ISap.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/ISap.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava \
+        -randroid.hardware:hardware/interfaces \
+        -randroid.hidl:system/libhidl/transport \
+        android.hardware.radio@1.1::ISap
+
+$(GEN): $(LOCAL_PATH)/ISap.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
 include $(BUILD_JAVA_LIBRARY)
 
 
@@ -733,6 +752,25 @@
 $(GEN): $(LOCAL_PATH)/IRadioResponse.hal
 	$(transform-generated-source)
 LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build ISap.hal
+#
+GEN := $(intermediates)/android/hardware/radio/V1_1/ISap.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/ISap.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava \
+        -randroid.hardware:hardware/interfaces \
+        -randroid.hidl:system/libhidl/transport \
+        android.hardware.radio@1.1::ISap
+
+$(GEN): $(LOCAL_PATH)/ISap.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
 include $(BUILD_STATIC_JAVA_LIBRARY)
 
 
diff --git a/radio/1.1/ISap.hal b/radio/1.1/ISap.hal
new file mode 100644
index 0000000..edcf176
--- /dev/null
+++ b/radio/1.1/ISap.hal
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2017 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.radio@1.1;
+
+import @1.0::ISap;
+
+interface ISap extends @1.0::ISap {
+    /**
+     * Empty top level interface.
+     */
+};