diff --git a/sky/engine/core/script/dart_service_isolate.cc b/sky/engine/core/script/dart_service_isolate.cc
index 01fa20de9714983ca851e2b0cbdfa7149701bf68..a827f26e5bd7a659370a572508c7135108d3d06d 100644
--- a/sky/engine/core/script/dart_service_isolate.cc
+++ b/sky/engine/core/script/dart_service_isolate.cc
@@ -4,6 +4,8 @@
 
 #include "dart_service_isolate.h"
 
+#include <string.h>
+
 #include "dart/runtime/include/dart_api.h"
 #include "lib/tonic/converter/dart_converter.h"
 #include "lib/tonic/logging/dart_error.h"