diff --git a/BUILD.gn b/BUILD.gn
index 69ed2d4..a200f6a 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -1767,6 +1767,7 @@
       "fuzz/FuzzParsePath.cpp",
       "fuzz/FuzzPathMeasure.cpp",
       "fuzz/FuzzPathop.cpp",
+      "fuzz/FuzzRegionOp.cpp",
       "fuzz/fuzz.cpp",
       "fuzz/oss_fuzz/FuzzAnimatedImage.cpp",
       "fuzz/oss_fuzz/FuzzImage.cpp",