diff --git a/mbtk/libql_lib/src/ql_audio.c b/mbtk/libql_lib/src/ql_audio.c
index 15fb155..12a65bb 100755
--- a/mbtk/libql_lib/src/ql_audio.c
+++ b/mbtk/libql_lib/src/ql_audio.c
@@ -12,11 +12,11 @@
 #define AUDIO_HANDLE 1
 #define WAV_PLAY_BUFF 1024
 
-
+#ifdef MBTK_AF_SUPPORT
 static mbtk_audio_handle player_hdl = NULL;
 static _cb_onRecorder record_cb_fun = NULL;
 static int Samprate = 8000;
-
+#endif
 
 static int sample_rate = 8000;
 static int play_handle = AUDIO_HANDLE;