diff --git a/rules.c b/rules.c
index 490bf696..07fdb41e 100644
--- a/rules.c
+++ b/rules.c
@@ -78,18 +78,6 @@ client_match_rule(Client *c, Rule *r)
     return ret;
 }
 
-int
-get_client_screen_from_rules(Client *c, Rule *rules)
-{
-    Rule *r;
-
-    for(r = rules; r; r = r->next)
-        if(client_match_rule(c, r))
-            return r->screen;
-
-    return RULE_NOSCREEN;
-}
-
 Bool
 is_tag_match_rules(Tag *t, Rule *r)
 {
diff --git a/rules.h b/rules.h
index 05145682..d6422ddc 100644
--- a/rules.h
+++ b/rules.h
@@ -28,7 +28,6 @@
 
 void compileregs(Rule *);
 Bool client_match_rule(Client *, Rule *);
-int get_client_screen_from_rules(Client *, Rule *);
 Bool is_tag_match_rules(Tag *, Rule *);
 
 #endif