diff --git a/source/blender/blenloader/intern/readfile.c b/source/blender/blenloader/intern/readfile.c
index 6ece27c2e46..0a149ce5b06 100644
--- a/source/blender/blenloader/intern/readfile.c
+++ b/source/blender/blenloader/intern/readfile.c
@@ -5587,11 +5587,59 @@ static void do_versions(FileData *fd, Library *lib, Main *main)
 		
 	if(main->versionfile <= 242) {
 		Scene *sce;
+		Object *ob;
 		
 		for(sce= main->scene.first; sce; sce= sce->id.next) {
 			if (sce->toolsettings->select_thresh == 0.0f)
 				sce->toolsettings->select_thresh= 0.01f;
 		}
+		
+		ob = main->object.first;
+
+		while (ob) {
+			ListBase *list;
+			list = &ob->constraints;
+
+			/* check for already existing MinMax (floor) constraint
+			   and update the sticky flagging */
+
+			if (list){
+				bConstraint *curcon;
+				for (curcon = list->first; curcon; curcon=curcon->next){
+					if (curcon->type == CONSTRAINT_TYPE_MINMAX){
+						bMinMaxConstraint *data = curcon->data;
+						if (data->sticky==1) {
+							data->flag|=MINMAX_STICKY;
+						} else {
+							data->flag&=~MINMAX_STICKY;
+						}
+					}
+				}
+			}
+
+			if (ob->type == OB_ARMATURE) {
+				if (ob->pose){
+					bConstraint *curcon;
+					bPoseChannel *pchan;
+					for (pchan = ob->pose->chanbase.first;
+						 pchan; pchan=pchan->next){
+						for (curcon = pchan->constraints.first;
+							 curcon; curcon=curcon->next){
+							if (curcon->type == CONSTRAINT_TYPE_MINMAX){
+								bMinMaxConstraint *data = curcon->data;
+								if (data->sticky==1) {
+									data->flag|=MINMAX_STICKY;
+								} else {
+									data->flag&=~MINMAX_STICKY;
+								}
+							}
+						}
+					}
+                }
+			}
+
+			ob = ob->id.next;
+		}
 	}
 	
 	/* WATCH IT!!!: pointers from libdata have not been converted yet here! */
diff --git a/source/blender/makesdna/DNA_constraint_types.h b/source/blender/makesdna/DNA_constraint_types.h
index dcc4b88680d..8b8f8ae0f72 100644
--- a/source/blender/makesdna/DNA_constraint_types.h
+++ b/source/blender/makesdna/DNA_constraint_types.h
@@ -100,6 +100,7 @@ typedef struct bMinMaxConstraint{
 	int			minmaxflag;
 	float			offset;
 	int				flag;
+	short			sticky, stuck, pad1, pad2; /* for backward compatability */
 	float			cache[3];
 	char		subtarget[32];
 } bMinMaxConstraint;