diff --git a/src/interfaces/libpq/Makefile b/src/interfaces/libpq/Makefile
index f116000..bece893 100644
--- a/src/interfaces/libpq/Makefile
+++ b/src/interfaces/libpq/Makefile
@@ -115,18 +115,21 @@ fe-misc.o: fe-misc.c $(top_builddir)/src/port/pg_config_paths.h
 $(top_builddir)/src/port/pg_config_paths.h:
 	$(MAKE) -C $(top_builddir)/src/port pg_config_paths.h
 
-install: all installdirs install-lib
+install: all installdirs install-lib install-dll-bin
 	$(INSTALL_DATA) $(srcdir)/libpq-fe.h '$(DESTDIR)$(includedir)'
 	$(INSTALL_DATA) $(srcdir)/libpq-events.h '$(DESTDIR)$(includedir)'
 	$(INSTALL_DATA) $(srcdir)/libpq-int.h '$(DESTDIR)$(includedir_internal)'
 	$(INSTALL_DATA) $(srcdir)/pqexpbuffer.h '$(DESTDIR)$(includedir_internal)'
 	$(INSTALL_DATA) $(srcdir)/pg_service.conf.sample '$(DESTDIR)$(datadir)/pg_service.conf.sample'
+ifneq (,$findstring($(PORTNAME), win32 cygwin))
+	$(INSTALL_DATA) $(shlib) '$(DESTDIR)$(bindir)/$(shlib)'
+endif
 
 installcheck:
 	$(MAKE) -C test $@
 
 installdirs: installdirs-lib
-	$(MKDIR_P) '$(DESTDIR)$(includedir)' '$(DESTDIR)$(includedir_internal)' '$(DESTDIR)$(datadir)'
+	$(MKDIR_P) '$(DESTDIR)$(includedir)' '$(DESTDIR)$(includedir_internal)' '$(DESTDIR)$(datadir)' '$(DESTDIR)$(bindir)'
 
 uninstall: uninstall-lib
 	rm -f '$(DESTDIR)$(includedir)/libpq-fe.h'
@@ -134,6 +137,9 @@ uninstall: uninstall-lib
 	rm -f '$(DESTDIR)$(includedir_internal)/libpq-int.h'
 	rm -f '$(DESTDIR)$(includedir_internal)/pqexpbuffer.h'
 	rm -f '$(DESTDIR)$(datadir)/pg_service.conf.sample'
+ifneq (,$findstring($(PORTNAME), win32 cygwin))
+	rm -f '$(DESTDIR)$(bindir)/$(shlib)'
+endif
 
 clean distclean: clean-lib
 	$(MAKE) -C test $@