diff --git a/src/makefiles/pgxs.mk b/src/makefiles/pgxs.mk
index 8b089e7a761..30c4b573e40 100644
--- a/src/makefiles/pgxs.mk
+++ b/src/makefiles/pgxs.mk
@@ -136,6 +136,9 @@ endif # MODULE_big
 
 
 installdirs:
+ifneq (,$(EXTENSION))
+	$(MKDIR_P) '$(DESTDIR)$(datadir)/extension'
+endif
 ifneq (,$(DATA)$(DATA_built))
 	$(MKDIR_P) '$(DESTDIR)$(datadir)/$(datamoduledir)'
 endif