diff --git a/cygwin/GNUmakefile.in b/cygwin/GNUmakefile.in
index 768a1b6b7f..60ff9f2ee0 100644
--- a/cygwin/GNUmakefile.in
+++ b/cygwin/GNUmakefile.in
@@ -86,7 +86,7 @@ GNUmakefile:	$(srcdir)/cygwin/GNUmakefile.in
 ifeq (@target_os@,mingw32)
 $(OBJS) $(MAINOBJ): win32.h
 
-dir.$(OBJEXT) win32.$(OBJEXT): win32/dir.h
+dir.$(OBJEXT) win32/win32.$(OBJEXT): win32/dir.h
 endif
 
 $(LIBRUBY_SO): $(RUBYDEF)