diff --git a/hal/audio_hw.c b/hal/audio_hw.c
index 63f6101..cd7d67f 100644
--- a/hal/audio_hw.c
+++ b/hal/audio_hw.c
@@ -3150,7 +3150,7 @@
     if (replied) {
         str = str_parms_to_str(reply);
     } else {
-        str = strdup(keys);
+        str = strdup("");
     }
     str_parms_destroy(query);
     str_parms_destroy(reply);