diff --git a/3party/open-location-code/openlocationcode.cc b/3party/open-location-code/openlocationcode.cc
index 4011058d21..b763ff1c3a 100644
--- a/3party/open-location-code/openlocationcode.cc
+++ b/3party/open-location-code/openlocationcode.cc
@@ -4,6 +4,7 @@
 
 #include <algorithm>
 #include <cmath>
+#include <cstdint>
 
 #include "codearea.h"