diff --git a/mediachanger/castorrmc/common/serror.c b/mediachanger/castorrmc/common/serror.c
index 036a6c59fb1ab4a3c9bb185e4cd178bf1a5c8667..595c8d25f000c0a49f552740c1bbb3eebb062286 100644
--- a/mediachanger/castorrmc/common/serror.c
+++ b/mediachanger/castorrmc/common/serror.c
@@ -13,10 +13,6 @@
 
 #include <string.h>
 
-#if !defined(linux)
-extern int      sys_nerr;       /* number of system error messages      */
-#endif
-
 const char *sys_serrlist[SEMAXERR-SEBASEOFF+2]=
   {"Error 0",
    "Host not known",