--- a/src/3rdparty/chromium/third_party/ots/include/opentype-sanitiser.h
+++ b/src/3rdparty/chromium/third_party/ots/include/opentype-sanitiser.h
@@ -21,6 +21,7 @@ typedef unsigned __int64 uint64_t;
 #define ots_htons(x) _byteswap_ushort (x)
 #else
 #include <arpa/inet.h>
+#include <sys/types.h>
 #include <stdint.h>
 #define ots_ntohl(x) ntohl (x)
 #define ots_ntohs(x) ntohs (x)