diff --git a/include/types/arg.h b/include/types/arg.h
index 7576f8a..651164b 100644
--- a/include/types/arg.h
+++ b/include/types/arg.h
@@ -77,6 +77,7 @@
 	ARGC_CAP,      /* capture rule */
 	ARGC_SRV,      /* server line */
 	ARGC_SPOE,     /* spoe message args */
+	ARGC_UBK,      /* use_backend message */
 };
 
 /* flags used when compiling and executing regex */
diff --git a/include/types/proxy.h b/include/types/proxy.h
index 27aa157..0b194cb 100644
--- a/include/types/proxy.h
+++ b/include/types/proxy.h
@@ -446,6 +446,8 @@
 		char *name;			/* target backend name during config parsing */
 		struct list expr;		/* logformat expression to use for dynamic rules */
 	} be;
+	char *file;
+	int line;
 };
 
 struct server_rule {