diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index a248912..1b39e22 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -1878,7 +1878,7 @@
               config->channel_mask,
               flags);
 
-    if (*devices == AUDIO_DEVICE_NONE) {
+    if (devices == NULL || *devices == AUDIO_DEVICE_NONE) {
         return BAD_VALUE;
     }