diff --git a/extensions/opus/src/main/jni/Android.mk b/extensions/opus/src/main/jni/Android.mk
index 7ca8300316..892715e9c6 100644
--- a/extensions/opus/src/main/jni/Android.mk
+++ b/extensions/opus/src/main/jni/Android.mk
@@ -16,7 +16,6 @@
 
 WORKING_DIR := $(call my-dir)
 include $(CLEAR_VARS)
-APP_PLATFORM := android-10
 
 # build libopus.so
 LOCAL_PATH := $(WORKING_DIR)
diff --git a/extensions/opus/src/main/jni/Application.mk b/extensions/opus/src/main/jni/Application.mk
index 6563af0f50..7dc417cda1 100644
--- a/extensions/opus/src/main/jni/Application.mk
+++ b/extensions/opus/src/main/jni/Application.mk
@@ -17,3 +17,4 @@
 APP_OPTIM := release
 APP_STL := gnustl_static
 APP_CPPFLAGS := -frtti
+APP_PLATFORM := android-9
diff --git a/extensions/vp9/src/main/jni/Android.mk b/extensions/vp9/src/main/jni/Android.mk
index fa566dbb50..f2d8a99a90 100644
--- a/extensions/vp9/src/main/jni/Android.mk
+++ b/extensions/vp9/src/main/jni/Android.mk
@@ -16,7 +16,6 @@
 
 WORKING_DIR := $(call my-dir)
 include $(CLEAR_VARS)
-APP_PLATFORM := android-10
 LIBVPX_ROOT := $(WORKING_DIR)/libvpx
 LIBYUV_ROOT := $(WORKING_DIR)/libyuv
 
diff --git a/extensions/vp9/src/main/jni/Application.mk b/extensions/vp9/src/main/jni/Application.mk
index 6563af0f50..7dc417cda1 100644
--- a/extensions/vp9/src/main/jni/Application.mk
+++ b/extensions/vp9/src/main/jni/Application.mk
@@ -17,3 +17,4 @@
 APP_OPTIM := release
 APP_STL := gnustl_static
 APP_CPPFLAGS := -frtti
+APP_PLATFORM := android-9