--- libdocument/ev-document-misc.c	2009-08-14 15:52:17.000000000 +0200
+++ libdocument/ev-document-misc.c	2009-10-22 15:04:48.000000000 +0200
@@ -60,6 +60,9 @@ ev_document_misc_get_thumbnail_frame (in
 				 width_r + 4,
 				 height_r + 4);
 
+	if (retval == NULL)
+		return NULL;
+
 	/* make it black and fill in the middle */
 	data = gdk_pixbuf_get_pixels (retval);
 	rowstride = gdk_pixbuf_get_rowstride (retval);