# Pastebin YlPJhI5m
diff --git a/src/core/Cool.pm b/src/core/Cool.pm
index 998de6e..61f8cbc 100644
--- a/src/core/Cool.pm
+++ b/src/core/Cool.pm
@@ -129,8 +129,8 @@ my class Cool { # declared in BOOTSTRAP
     method trans(|c) { self.Str.trans(|c) }
 
     proto method starts-with(|) {*}
-    multi method starts-with(Cool:D: Str(Cool) $needle) {
-        self.Str.starts-with($needle)
+    multi method starts-with(Cool:D: |c) {
+        self.Str.starts-with(|c)
     }
 
     proto method ends-with(|) {*}