diff --git a/ext/amrnb/amrnbdec.c b/ext/amrnb/amrnbdec.c
index 653f1c5923..8f2c422990 100644
--- a/ext/amrnb/amrnbdec.c
+++ b/ext/amrnb/amrnbdec.c
@@ -241,14 +241,12 @@ gst_amrnbdec_parse (GstAudioDecoder * dec, GstAdapter * adapter,
   gint block, mode;
 
   size = gst_adapter_available (adapter);
-  g_return_val_if_fail (size > 0, GST_FLOW_ERROR);
+  if (size < 1)
+    return GST_FLOW_ERROR;
 
   gst_audio_decoder_get_parse_state (dec, &sync, &eos);
 
   /* need to peek data to get the size */
-  if (size < 1)
-    return GST_FLOW_ERROR;
-
   gst_adapter_copy (adapter, head, 0, 1);
 
   /* get size */