diff --git a/tests/reflection_test.h b/tests/reflection_test.h
index d5148679d14..090871963ac 100644
--- a/tests/reflection_test.h
+++ b/tests/reflection_test.h
@@ -1,6 +1,7 @@
 #ifndef TESTS_REFLECTION_TEST_H
 #define TESTS_REFLECTION_TEST_H
 
+#include <stdint.h>
 #include <string>
 
 namespace flatbuffers {