diff --git a/src/protocol/eval.rs b/src/protocol/eval.rs
index 0d37e152b5c05da853162089be83102d9ce49477..a337ef11a732ee6b50a149b64e7d6ea2c77f31ac 100644
--- a/src/protocol/eval.rs
+++ b/src/protocol/eval.rs
@@ -88,6 +88,7 @@ impl Value {
             }
             Literal::Character(_data) => unimplemented!(),
             Literal::Struct(_data) => unimplemented!(),
+            Literal::Enum(_data) => unimplemented!(),
         }
     }
     fn set(&mut self, index: &Value, value: &Value) -> Option<Value> {