diff --git a/Utilities/cmlibrhash/librhash/rhash.c b/Utilities/cmlibrhash/librhash/rhash.c
index ce6ace41d4..25301125a5 100644
--- a/Utilities/cmlibrhash/librhash/rhash.c
+++ b/Utilities/cmlibrhash/librhash/rhash.c
@@ -20,6 +20,7 @@
 #endif
 
 /* macros for large file support, must be defined before any include file */
+#define _LARGEFILE_SOURCE
 #define _LARGEFILE64_SOURCE
 #define _FILE_OFFSET_BITS 64