diff --git a/crc.h b/crc.h
index 362ab18f2..a58b165f0 100644
--- a/crc.h
+++ b/crc.h
@@ -6,6 +6,8 @@
 #ifndef CRC_H_
 #define CRC_H_
 
+#include <cstdint>
+
 static const uint32_t kCrc32Table[256] = {
     0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832,
     0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,