diff --git a/src/backend/port/Makefile b/src/backend/port/Makefile
index 2560d6b16e..8ebb6d5703 100644
--- a/src/backend/port/Makefile
+++ b/src/backend/port/Makefile
@@ -23,10 +23,6 @@ include $(top_builddir)/src/Makefile.global
 
 OBJS = dynloader.o pg_sema.o pg_shmem.o pg_latch.o $(TAS)
 
-ifneq (,$(filter $(PORTNAME),cygwin win32))
-OBJS += pipe.o
-endif
-
 ifeq ($(PORTNAME), darwin)
 SUBDIRS += darwin
 endif