diff --git a/source/blender/editors/animation/anim_filter.c b/source/blender/editors/animation/anim_filter.c
index af6ddca9f44..b07a54869ac 100644
--- a/source/blender/editors/animation/anim_filter.c
+++ b/source/blender/editors/animation/anim_filter.c
@@ -1185,7 +1185,7 @@ static int animdata_filter_dopesheet_mats (bAnimContext *ac, ListBase *anim_data
 	int items=0, a=0;
 	
 	/* firstly check that we actuallly have some materials, by gathering all materials in a temp list */
-	for (a=0; a < ob->totcol; a++) {
+	for (a=1; a <= ob->totcol; a++) {
 		Material *ma= give_current_material(ob, a);
 		short ok = 0;
 		
diff --git a/source/blender/editors/animation/keyframes_draw.c b/source/blender/editors/animation/keyframes_draw.c
index da1233c17f1..3b91e9153de 100644
--- a/source/blender/editors/animation/keyframes_draw.c
+++ b/source/blender/editors/animation/keyframes_draw.c
@@ -767,7 +767,7 @@ void ob_to_keylist(bDopeSheet *ads, Object *ob, DLRBT_Tree *keys, DLRBT_Tree *bl
 	if ((ob->totcol) && !(filterflag & ADS_FILTER_NOMAT)) {
 		int a;
 		
-		for (a=0; a < ob->totcol; a++) {
+		for (a=1; a <= ob->totcol; a++) {
 			Material *ma= give_current_material(ob, a);
 			
 			/* there might not be a material */
diff --git a/source/blender/editors/animation/keyframes_edit.c b/source/blender/editors/animation/keyframes_edit.c
index 828ff9792be..fe78a058d24 100644
--- a/source/blender/editors/animation/keyframes_edit.c
+++ b/source/blender/editors/animation/keyframes_edit.c
@@ -219,7 +219,7 @@ static short ob_keys_bezier_loop(BeztEditData *bed, Object *ob, BeztEditFunc bez
 	if ((ob->totcol) && !(filterflag & ADS_FILTER_NOMAT)) {
 		int a;
 		
-		for (a=0; a < ob->totcol; a++) {
+		for (a=1; a <= ob->totcol; a++) {
 			Material *ma= give_current_material(ob, a);
 			
 			/* there might not be a material */