diff --git a/ChangeLog b/ChangeLog
index a848ef3262..1745591141 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2004-10-29  Ronald S. Bultje  <rbultje@ronald.bitfreak.net>
+
+	* gst/audioconvert/gstaudioconvert.c:
+	(gst_audio_convert_buffer_to_default_format):
+	  Really don't touch read-only buffers (#156563).
+
 2004-10-29  Sebastien Cote  <sc5@hermes.usherb.ca>
 
 	Reviewd by:  Ronald S. Bultje  <rbultje@ronald.bitfreak.net>
diff --git a/gst/audioconvert/gstaudioconvert.c b/gst/audioconvert/gstaudioconvert.c
index b2907ccea1..8e108a7d11 100644
--- a/gst/audioconvert/gstaudioconvert.c
+++ b/gst/audioconvert/gstaudioconvert.c
@@ -661,6 +661,7 @@ gst_audio_convert_buffer_to_default_format (GstAudioConvert * this,
     /* float2int */
     gfloat *in;
     gint32 *out;
+    float temp;
 
     /* should just give the same buffer, unless it's not writable -- float is
      * already 32 bits */
@@ -669,8 +670,8 @@ gst_audio_convert_buffer_to_default_format (GstAudioConvert * this,
     in = (gfloat *) GST_BUFFER_DATA (buf);
     out = (gint32 *) GST_BUFFER_DATA (ret);
     for (i = buf->size / sizeof (float); i > 0; i--) {
-      *in *= 2147483647.0f + .5;
-      *out = (gint32) CLAMP ((gint64) * in, -2147483648ll, 2147483647ll);
+      temp = *in * 2147483647.0f + .5;
+      *out = (gint32) CLAMP ((gint64) temp, -2147483648ll, 2147483647ll);
       out++;
       in++;
     }