diff --git a/ChangeLog b/ChangeLog
index 6000f217a5..56ad193999 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2007-12-06  Sebastian Dröge  <slomo@circular-chaos.org>
+
+	* gst/equalizer/gstiirequalizer.c:
+	(gst_iir_equalizer_transform_ip):
+	Don't process buffers in passthrough mode.
+
 2007-12-06  Sebastian Dröge  <slomo@circular-chaos.org>
 
 	* gst/filter/gstbpwsinc.c: (bpwsinc_transform):
diff --git a/gst/equalizer/gstiirequalizer.c b/gst/equalizer/gstiirequalizer.c
index cd955e2893..7cc4f7a3ac 100644
--- a/gst/equalizer/gstiirequalizer.c
+++ b/gst/equalizer/gstiirequalizer.c
@@ -567,6 +567,9 @@ gst_iir_equalizer_transform_ip (GstBaseTransform * btrans, GstBuffer * buf)
   GstIirEqualizer *equ = GST_IIR_EQUALIZER (btrans);
   GstClockTime timestamp;
 
+  if (gst_base_transform_is_passthrough (base))
+    return GST_FLOW_OK;
+
   if (G_UNLIKELY (filter->format.channels < 1 || equ->process == NULL))
     return GST_FLOW_NOT_NEGOTIATED;