--- a/mozc/src/third_party/abseil-cpp/absl/strings/internal/str_format/extension.h
+++ b/mozc/src/third_party/abseil-cpp/absl/strings/internal/str_format/extension.h
@@ -19,6 +19,7 @@
 #include <limits.h>
 
 #include <cstddef>
+#include <cstdint>
 #include <cstring>
 #include <ostream>