diff --git a/inc/thorvg_capi.h b/inc/thorvg_capi.h
index 87c9476d..6aae0f8d 100644
--- a/inc/thorvg_capi.h
+++ b/inc/thorvg_capi.h
@@ -108,7 +108,8 @@ typedef enum {
 typedef enum {
     TVG_COMPOSITE_METHOD_NONE = 0,
     TVG_COMPOSITE_METHOD_CLIP_PATH,
-    TVG_COMPOSITE_METHOD_ALPHA_MASK
+    TVG_COMPOSITE_METHOD_ALPHA_MASK,
+    TVG_COMPOSITE_METHOD_INVERSE_ALPHA_MASK,
 } Tvg_Composite_Method;
 
 typedef struct