diff --git a/fxjs/cjs_util.cpp b/fxjs/cjs_util.cpp
index 91aacab..5823ee1 100644
--- a/fxjs/cjs_util.cpp
+++ b/fxjs/cjs_util.cpp
@@ -27,7 +27,7 @@
 #include "third_party/base/cxx17_backports.h"
 #include "v8/include/v8-date.h"
 
-#if defined(OS_ANDROID)
+#if BUILDFLAG(IS_ANDROID)
 #include <ctype.h>
 #endif