diff --git a/BUILD.gn b/BUILD.gn
index 5cc2733..d56c37c 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -30,7 +30,7 @@
     "pngwutil.c",
   ]
 
-  if ((is_android || is_linux || is_fuchsia || is_ios) &&
+  if ((is_android || is_linux || is_fuchsia || is_ios || is_mac) &&
        (current_cpu == "arm" || current_cpu == "arm64")) {
     sources += [
       "arm/arm_init.c",