diff --git a/src/voice_engine/main/source/Android.mk b/src/voice_engine/main/source/Android.mk
index cd944eee27..d476575645 100644
--- a/src/voice_engine/main/source/Android.mk
+++ b/src/voice_engine/main/source/Android.mk
@@ -49,7 +49,8 @@ LOCAL_SRC_FILES := \
 
 # Flags passed to both C and C++ files.
 LOCAL_CFLAGS := \
-    $(MY_WEBRTC_COMMON_DEFS)
+    $(MY_WEBRTC_COMMON_DEFS) \
+   '-DWEBRTC_ANDROID_OPENSLES'
 
 LOCAL_C_INCLUDES := \
     $(LOCAL_PATH)/../interface \