diff --git a/hal/audio_hw.c b/hal/audio_hw.c
index d7769ff..21dc9ed 100644
--- a/hal/audio_hw.c
+++ b/hal/audio_hw.c
@@ -3140,7 +3140,7 @@
     if (replied) {
         str = str_parms_to_str(reply);
     } else {
-        str = strdup(keys);
+        str = strdup("");
     }
     str_parms_destroy(query);
     str_parms_destroy(reply);