diff --git a/arch/or1k/include/types.h b/arch/or1k/include/types.h
index 43de7d4400e..0e7c4a35c94 100644
--- a/arch/or1k/include/types.h
+++ b/arch/or1k/include/types.h
@@ -79,6 +79,9 @@ typedef unsigned long long _uint64_t;
 
 #define __INT64_DEFINED    1
 
+typedef _int64_t           _intmax_t;
+typedef _uint64_t          _uintmax_t;
+
 /* A size is 4 bytes */
 
 #if defined(__SIZE_TYPE__)