diff --git a/gst/speexresample/gstspeexresample.c b/gst/speexresample/gstspeexresample.c
index 798e0c6fb3..7d04257a37 100644
--- a/gst/speexresample/gstspeexresample.c
+++ b/gst/speexresample/gstspeexresample.c
@@ -569,6 +569,8 @@ static void
 gst_speex_resample_convert_buffer (GstSpeexResample * resample,
     const guint8 * in, guint8 * out, guint len, gboolean inverse)
 {
+  len *= resample->channels;
+
   if (inverse) {
     if (resample->width == 8 && !resample->fp) {
       gint8 *o = (gint8 *) out;