diff --git a/ORCACDefs/errno.h b/ORCACDefs/errno.h
index 22485ea..0b4b994 100644
--- a/ORCACDefs/errno.h
+++ b/ORCACDefs/errno.h
@@ -27,5 +27,6 @@
 #define ENOSPC                  11      /* the file is too large */
 
 extern int errno;
+#define errno errno
 
 #endif