diff --git a/source/blender/editors/mesh/editmesh_mods.c b/source/blender/editors/mesh/editmesh_mods.c
index 09ea9088a16..3135863d571 100644
--- a/source/blender/editors/mesh/editmesh_mods.c
+++ b/source/blender/editors/mesh/editmesh_mods.c
@@ -2033,6 +2033,9 @@ static void mouse_mesh_loop(bContext *C, short mval[2], short extend, short ring
 	vc.mval[0]= mval[0];
 	vc.mval[1]= mval[1];
 	em= vc.em;
+
+	/* no afterqueue (yet), so we check it now, otherwise the em_xxxofs indices are bad */
+	view3d_validate_backbuf(&vc);
 	
 	eed= findnearestedge(&vc, &dist);
 	if(eed) {
@@ -2110,6 +2113,9 @@ static void mouse_mesh_shortest_path(bContext *C, short mval[2])
 	vc.mval[1]= mval[1];
 	em= vc.em;
 	
+	/* no afterqueue (yet), so we check it now, otherwise the em_xxxofs indices are bad */
+	view3d_validate_backbuf(&vc);
+	
 	eed= findnearestedge(&vc, &dist);
 	if(eed) {
 		Mesh *me= vc.obedit->data;