diff --git a/src/protocol/ast.rs b/src/protocol/ast.rs
index f5b019aa858831cd425d5702b0db9156beff0e62..e25a4c6096979e401e406744b0c72680eb815cb4 100644
--- a/src/protocol/ast.rs
+++ b/src/protocol/ast.rs
@@ -396,7 +396,7 @@ impl ParserTypeVariant {
                 0,
             ArrayLike | InputOrOutput | Array | Input | Output =>
                 1,
-            Definition(_, num) => *num,
+            Definition(_, num) => *num as usize,
         }
     }
 }
@@ -515,16 +515,6 @@ impl Default for ConcreteType {
     }
 }
 
-impl ConcreteType {
-    pub(crate) fn has_marker(&self) -> bool {
-        self.parts
-            .iter()
-            .any(|p| {
-                if let ConcreteTypePart::Marker(_) = p { true } else { false }
-            })
-    }
-}
-
 // TODO: Remove at some point
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub enum PrimitiveType {