diff --git a/src/makefiles/pgxs.mk b/src/makefiles/pgxs.mk
index 318d5ef3070..fd6473fd910 100644
--- a/src/makefiles/pgxs.mk
+++ b/src/makefiles/pgxs.mk
@@ -146,6 +146,9 @@ endif # MODULE_big
 
 
 installdirs:
+ifneq (,$(EXTENSION))
+	$(MKDIR_P) '$(DESTDIR)$(datadir)/extension'
+endif
 ifneq (,$(DATA)$(DATA_built))
 	$(MKDIR_P) '$(DESTDIR)$(datadir)/$(datamoduledir)'
 endif