diff --git a/src/makefiles/pgxs.mk b/src/makefiles/pgxs.mk
index 0de3737e789..039cee3dfe5 100644
--- a/src/makefiles/pgxs.mk
+++ b/src/makefiles/pgxs.mk
@@ -376,10 +376,7 @@ endif
 ifdef REGRESS
 # things created by various check targets
 	rm -rf $(pg_regress_clean_files)
-ifeq ($(PORTNAME), win)
-	rm -f regress.def
 endif
-endif # REGRESS
 ifdef TAP_TESTS
 	rm -rf tmp_check/
 endif