diff --git a/ghc/tests/io/should_run/Makefile b/ghc/tests/io/should_run/Makefile
index dcdd7e6c8b719632e2d719baa03f91a55e04f834..61f30d705d45f04e83c618ef4aaeaa7136f8e9d4 100644
--- a/ghc/tests/io/should_run/Makefile
+++ b/ghc/tests/io/should_run/Makefile
@@ -3,7 +3,8 @@ TOP = ../..
 include $(TOP)/mk/boilerplate.mk
 
 ifeq "$(TARGETPLATFORM)" "i386-unknown-mingw32"
-OMITTED_RUNTESTS = io005.run io033.run
+# io018 should run
+OMITTED_RUNTESTS = io005.run io018.run io033.run
 endif
 
 include $(TOP)/mk/should_run.mk