diff --git a/src/interpreter/mod.rs b/src/interpreter/mod.rs
index 3262d00..3cbe3da 100644
--- a/src/interpreter/mod.rs
+++ b/src/interpreter/mod.rs
@@ -52,7 +52,7 @@ impl fmt::Display for Value {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         match self {
             Value::Number(n) => write!(f, "{}", n),
-            Value::String(s) => write!(f, "{}", s),
+            Value::String(s) => write!(f, "\"{}\"", s),
             Value::Bool(b) => write!(f, "{}", b),
             Value::Nil => write!(f, "nil"),
             Value::Object(obj) => {