diff --git a/tests/check/elements/interleave.c b/tests/check/elements/interleave.c
index be0a4b6bad..51d169dc0e 100644
--- a/tests/check/elements/interleave.c
+++ b/tests/check/elements/interleave.c
@@ -482,6 +482,8 @@ sink_handoff_float32 (GstElement * element, GstBuffer * buffer, GstPad * pad,
       GST_AUDIO_CHANNEL_POSITION_REAR_CENTER
     };
     gst_audio_channel_positions_to_mask (pos, 2, FALSE, &mask);
+  } else {
+    g_assert_not_reached ();
   }
 
   caps = gst_caps_new_simple ("audio/x-raw",