diff --git a/gst/level/filter.func b/gst/level/filter.func
index 96b1d644a3..107b02b5e0 100644
--- a/gst/level/filter.func
+++ b/gst/level/filter.func
@@ -1,3 +1,8 @@
+/*
+static void inline
+gst_level_fast_16bit_chain (gint16 * in, guint num, gint channels,
+    gint resolution, double *CS, double *peak)
+*/
 /* process one (interleaved) channel of incoming samples
  * calculate square sum of samples
  * normalize and return normalized Cumulative Square
diff --git a/gst/level/gstlevel.c b/gst/level/gstlevel.c
index 889ed50507..dc51b705de 100644
--- a/gst/level/gstlevel.c
+++ b/gst/level/gstlevel.c
@@ -201,6 +201,7 @@ gst_level_fast_16bit_chain (gint16 * in, guint num, gint channels,
 
   in_data = (gint16 *) GST_BUFFER_DATA (buf);
 
+  /* total number of interleaved samples */
   num_samples = GST_BUFFER_SIZE (buf) / (filter->width / 8);
   if (num_samples % filter->channels != 0)
     g_warning