diff --git a/binding/libSkiaSharp.json b/binding/libSkiaSharp.json
index cf4cc50988..32d66c54d8 100644
--- a/binding/libSkiaSharp.json
+++ b/binding/libSkiaSharp.json
@@ -304,6 +304,9 @@
       "sk_mask_t": {
         "properties": false
       },
+      "sk_matrix_type_mask_t": {
+        "flags": true
+      },
       "sk_matrix44_type_mask_t": {
         "flags": true
       },