diff --git a/lib/roken/getdtablesize.c b/lib/roken/getdtablesize.c
index dd9c5d8b7..999e72ca5 100644
--- a/lib/roken/getdtablesize.c
+++ b/lib/roken/getdtablesize.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
+ * Copyright (c) 1995-2001 Kungliga Tekniska Högskolan
  * (Royal Institute of Technology, Stockholm, Sweden).
  * All rights reserved.
  * 
@@ -82,7 +82,7 @@ int getdtablesize(void)
   mib[0] = CTL_KERN;
   mib[1] = KERN_MAXFILES;
   len = sizeof(files);
-  sysctl(&mib, 2, &files, sizeof(nfil), NULL, 0);
+  sysctl(&mib, 2, &files, sizeof(files), NULL, 0);
 #endif /* defined(HAVE_SYSCTL) */
 #endif /* !definded(HAVE_GETRLIMIT) */
 #endif /* !defined(HAVE_SYSCONF) */