--- a/runtime/bin/ffi_test/ffi_test_functions_generated.cc
+++ b/runtime/bin/ffi_test/ffi_test_functions_generated.cc
@@ -11,6 +11,7 @@
 #include <sys/types.h>
 
 #include <cmath>
+#include <cstdint>
 #include <iostream>
 #include <limits>
 
--- a/runtime/bin/ffi_test/ffi_test_functions.cc
+++ b/runtime/bin/ffi_test/ffi_test_functions.cc
@@ -13,6 +13,7 @@
 #include <sys/types.h>
 
 #include <cmath>
+#include <cstdint>
 #include <iostream>
 #include <limits>