diff --git a/src/parser/parser_types.nim b/src/parser/parser_types.nim
index 8e38aca..8ae8810 100644
--- a/src/parser/parser_types.nim
+++ b/src/parser/parser_types.nim
@@ -72,7 +72,7 @@ proc initBuilder*[T](t: Builder[T], parser: Parser, tree: seq[T]): Builder[T] =
 
 # -- Getters
 
-proc tokenStringValue*(x: ParserToken): string =
+func tokenStringValue*(x: ParserToken): string =
   ## Get the Token value `x` as a string.
   case x.kind:
     of parserTokenChar: