diff --git a/hal/audio_hw.c b/hal/audio_hw.c
index caf7848..0816aa8 100644
--- a/hal/audio_hw.c
+++ b/hal/audio_hw.c
@@ -437,7 +437,7 @@
 };
 
 static struct audio_device *adev = NULL;
-static pthread_mutex_t adev_init_lock;
+static pthread_mutex_t adev_init_lock = PTHREAD_MUTEX_INITIALIZER;
 static unsigned int audio_device_ref_count;
 //cache last MBDRC cal step level
 static int last_known_cal_step = -1 ;