diff --git a/common/rdr/types.h b/common/rdr/types.h
index 05d2777..c17197d 100644
--- a/common/rdr/types.h
+++ b/common/rdr/types.h
@@ -19,8 +19,9 @@
 #ifndef __RDR_TYPES_H__
 #define __RDR_TYPES_H__
 
-namespace rdr {
+#include <cstdint>
 
+namespace rdr {
   typedef unsigned char U8;
   typedef unsigned short U16;
   typedef unsigned int U32;