diff --git a/libs/openzap/mod_openzap/Makefile.in b/libs/openzap/mod_openzap/Makefile.in
index 27eb4f3e8b..85275d1d8d 100644
--- a/libs/openzap/mod_openzap/Makefile.in
+++ b/libs/openzap/mod_openzap/Makefile.in
@@ -15,7 +15,7 @@ $(OZLA): $(OZ_DIR)/.update
 
 local_install:
 	cd $(OZ_DIR) && $(MAKE) install
-	[ -f $(DESTDIR)$(PREFIX)/conf/autoload_configs/openzap.conf.xml ] || cp -f $(OZ_DIR)/conf/openzap.conf.xml  $(DESTDIR)$(PREFIX)/conf/autoload_configs
+	[ -f $(DESTDIR)@confdir@/autoload_configs/openzap.conf.xml ] || cp -f $(OZ_DIR)/conf/openzap.conf.xml  $(DESTDIR)@confdir@/autoload_configs
 
 local_clean:
 	cd $(OZ_DIR) && $(MAKE) clean