diff --git a/gst/gstmemory.c b/gst/gstmemory.c
index 36259fca44..3505ac2795 100644
--- a/gst/gstmemory.c
+++ b/gst/gstmemory.c
@@ -197,6 +197,7 @@ void
 gst_memory_resize (GstMemory * mem, gssize offset, gsize size)
 {
   g_return_if_fail (mem != NULL);
+  g_return_if_fail (gst_memory_is_writable (mem));
   g_return_if_fail (offset >= 0 || mem->offset >= -offset);
   g_return_if_fail (size + mem->offset + offset <= mem->maxsize);