diff --git a/schala-lang/language/src/prelude.schala b/schala-lang/language/src/prelude.schala
index 6ed8784..0a6c93f 100644
--- a/schala-lang/language/src/prelude.schala
+++ b/schala-lang/language/src/prelude.schala
@@ -6,8 +6,8 @@ type Ord = LT | EQ | GT
 
 fn map(input: Option<T>, func: Func): Option<T> {
   if input {
-    is Option::Some(x) -> Option::Some(func(x)),
-    is Option::None -> Option::None,
+    is Option::Some(x) then Option::Some(func(x)),
+    is Option::None then Option::None,
   }
 }