diff --git a/inc/rlottiecommon.h b/inc/rlottiecommon.h
index edc6299be8..cc198a4baf 100644
--- a/inc/rlottiecommon.h
+++ b/inc/rlottiecommon.h
@@ -130,6 +130,8 @@ typedef struct LOTMask {
         int          elmCount;
     } mPath;
     LOTMaskMode mMode;
+
+    int mAlpha;
 }LOTMask;
 
 typedef enum
diff --git a/src/lottie/lottieitem.cpp b/src/lottie/lottieitem.cpp
index 6e78206717..21a2e135be 100644
--- a/src/lottie/lottieitem.cpp
+++ b/src/lottie/lottieitem.cpp
@@ -230,6 +230,7 @@ void LOTLayerItem::buildLayerNode()
             cNode.mPath.ptCount = pts.size();
             cNode.mPath.elmPtr = elmPtr;
             cNode.mPath.elmCount = elm.size();
+            cNode.mAlpha = mask.mCombinedAlpha * 255;
             switch (mask.maskMode()) {
             case LOTMaskData::Mode::Add:
                 cNode.mMode = MaskModeAdd;