diff -up udunits-2.2.28/lib/xml.c.bad-logic udunits-2.2.28/lib/xml.c
--- udunits-2.2.28/lib/xml.c.bad-logic	2021-07-08 10:46:58.419418793 -0400
+++ udunits-2.2.28/lib/xml.c	2021-07-08 10:47:13.421507912 -0400
@@ -2217,7 +2217,7 @@ ut_get_path_xml(
         	*status = UT_OPEN_ENV;
     	}
     	else {
-          	path = default_udunits2_xml_path();
+          	path = DEFAULT_UDUNITS2_XML_PATH;
         	*status = UT_OPEN_DEFAULT;
     	}
     }