diff --git a/include/errno.h b/include/errno.h
index 10399b594..129d103cf 100755
--- a/include/errno.h
+++ b/include/errno.h
@@ -99,6 +99,7 @@ extern int errno;		  /* place where the error numbers go */
 #define EADDRNOTAVAIL (_SIGN 71)  /* Can't assign requested address */
 #define EALREADY      (_SIGN 72)  /* Connection already in progress */
 #define EMSGSIZE      (_SIGN 73)  /* Message too long */
+#define ELOOP         (_SIGN 74)  /* Too many levels of symbolic links */
 
 /* The following are not POSIX errors, but they can still happen. 
  * All of these are generated by the kernel and relate to message passing.