1 files changed, 1 insertions, 1 deletions
diff --git a/doio.c b/doio.c
index 3e412b8c2f..0463af8b3b 100644
--- a/doio.c
+++ b/doio.c
@@ -573,7 +573,7 @@ Perl_nextargv(pTHX_ register GV *gv)
 		    }
 #endif
 #ifdef HAS_RENAME
-#if !defined(DOSISH) && !defined(CYGWIN)
+#if !defined(DOSISH) && !defined(__CYGWIN__)
 		    if (PerlLIO_rename(PL_oldname,SvPVX(sv)) < 0) {
 		        if (ckWARN_d(WARN_INPLACE))	
 			    Perl_warner(aTHX_ WARN_INPLACE,