diff --git a/gst/audioparsers/gstaacparse.c b/gst/audioparsers/gstaacparse.c
index 34ba80a7c2..d9dc424e54 100644
--- a/gst/audioparsers/gstaacparse.c
+++ b/gst/audioparsers/gstaacparse.c
@@ -1452,11 +1452,13 @@ gst_aac_parse_pre_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
       && aacparse->output_header_type == DSPAAC_HEADER_NONE) {
     guint header_size;
     GstMapInfo map;
-    gst_buffer_map (frame->buffer, &map, GST_MAP_READ);
+    frame->out_buffer = gst_buffer_make_writable (frame->buffer);
+    frame->buffer = NULL;
+    gst_buffer_map (frame->out_buffer, &map, GST_MAP_READ);
     header_size = (map.data[1] & 1) ? 7 : 9;    /* optional CRC */
-    gst_buffer_unmap (frame->buffer, &map);
-    gst_buffer_resize (frame->buffer, header_size,
-        gst_buffer_get_size (frame->buffer) - header_size);
+    gst_buffer_unmap (frame->out_buffer, &map);
+    gst_buffer_resize (frame->out_buffer, header_size,
+        gst_buffer_get_size (frame->out_buffer) - header_size);
   }
 
   return GST_FLOW_OK;