diff --git a/source/blender/blenloader/intern/readfile.c b/source/blender/blenloader/intern/readfile.c
index d63374d472d..7f802b95f14 100644
--- a/source/blender/blenloader/intern/readfile.c
+++ b/source/blender/blenloader/intern/readfile.c
@@ -2421,7 +2421,11 @@ static void direct_link_modifiers(FileData *fd, ListBase *lb)
 
 	for (md=lb->first; md; md=md->next) {
 		md->error = NULL;
-
+		
+		/* if modifiers disappear, or for upward compatibility */
+		if(NULL==modifierType_getInfo(md->type))
+			md->type= eModifierType_None;
+			
 		if (md->type==eModifierType_Subsurf) {
 			SubsurfModifierData *smd = (SubsurfModifierData*) md;
 
diff --git a/source/blender/makesdna/DNA_modifier_types.h b/source/blender/makesdna/DNA_modifier_types.h
index 5bc4015eb96..24400996831 100644
--- a/source/blender/makesdna/DNA_modifier_types.h
+++ b/source/blender/makesdna/DNA_modifier_types.h
@@ -5,6 +5,8 @@
 #ifndef DNA_MODIFIER_TYPES_H
 #define DNA_MODIFIER_TYPES_H
 
+/* WARNING ALERT! TYPEDEF VALUES ARE WRITTEN IN FILES! SO DO NOT CHANGE! */
+
 typedef enum ModifierType {
 	eModifierType_None = 0,
 	eModifierType_Subsurf,