diff --git a/src/modal.c b/src/modal.c
index 98afefa..58f19f2 100644
--- a/src/modal.c
+++ b/src/modal.c
@@ -136,7 +136,7 @@ add_rule(char *p)
 {
 	char c;
 	Rule *r = rules_++;
-	p += 2;
+	r->id = rules_ - rules - 1, p += 2;
 	while((c = *p) && c <= ' ') p++;
 	r->a = parse_rule(p), p = walk(p);
 	while((c = *p) && c <= ' ') p++;