diff --git a/src/ast/compiler/specializer.rs b/src/ast/compiler/specializer.rs
index 994001c..82ae0d2 100644
--- a/src/ast/compiler/specializer.rs
+++ b/src/ast/compiler/specializer.rs
@@ -236,7 +236,10 @@ impl Specializer {
             self.cache
                 .borrow_mut()
                 .insert(key, (compiled_val.clone(), ret_ty.clone()));
-            let flat_elements = self.flatten_tuple(new_args.clone());
+            let flat_elements = match new_args.kind {
+                BoundKind::Tuple { elements } => elements,
+                _ => vec![new_args.clone()],
+            };
             let flat_types = flat_elements
                 .iter()
                 .map(|e| e.ty.original.ty.clone())
@@ -292,11 +295,4 @@ impl Specializer {
             },
         }
     }
-
-    fn flatten_tuple(&self, node: AnalyzedNode) -> Vec<AnalyzedNode> {
-        match node.kind {
-            BoundKind::Tuple { elements } => elements,
-            _ => vec![node],
-        }
-    }
 }