diff --git a/source/blender/blenkernel/BKE_animsys.h b/source/blender/blenkernel/BKE_animsys.h
index 70a0cd34a6c..b45917e6ca1 100644
--- a/source/blender/blenkernel/BKE_animsys.h
+++ b/source/blender/blenkernel/BKE_animsys.h
@@ -14,6 +14,7 @@ struct KS_Path;
 
 struct PointerRNA;
 struct bAction;
+struct bActionGroup;
 struct AnimMapper;
 
 /* ************************************* */