--- mono/mono/io-layer/wapi_glob.c
+++ mono/mono/io-layer/wapi_glob.c
@@ -300,7 +300,7 @@
 	pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
 
 	if ((pglob->gl_flags & WAPI_GLOB_LIMIT) &&
-	    newsize + *limitp >= ARG_MAX) {
+	    newsize + *limitp >= sysconf (_SC_ARG_MAX)) {
 		errno = 0;
 		return(WAPI_GLOB_NOSPACE);
 	}