diff --git a/samples/android/face-detection/jni/Android.mk b/samples/android/face-detection/jni/Android.mk
index 9271198bfc..9f484666f9 100644
--- a/samples/android/face-detection/jni/Android.mk
+++ b/samples/android/face-detection/jni/Android.mk
@@ -13,7 +13,7 @@ else
 endif
 
 LOCAL_SRC_FILES  := DetectionBasedTracker_jni.cpp
-LOCAL_C_INCLUDES := $(LOCAL_PATH)
+LOCAL_C_INCLUDES += $(LOCAL_PATH)
 LOCAL_LDLIBS +=  -llog -ldl
 
 LOCAL_MODULE     := detection_based_tacker