--- a/Makefile
+++ b/Makefile
@@ -16,3 +16,5 @@ include $(PGXS)
 ifneq ($(PORTNAME), win32)
 override CFLAGS += $(PTHREAD_CFLAGS)
 endif
+
+LIBS = $(libpq_pgport) -L$(pkglibdir) -lpgcommon -lpgport