diff --git a/exercises/quiz4.rs b/exercises/quiz4.rs
index 6c47480..f67bf69 100644
--- a/exercises/quiz4.rs
+++ b/exercises/quiz4.rs
@@ -6,6 +6,11 @@
 // Write a macro that passes the quiz! No hints this time, you can do it!
 
 // I AM NOT DONE
+macro_rules! my_macro {
+    ($val:expr) => {
+        format!("Hello {}", $val)
+    };
+}
 
 #[cfg(test)]
 mod tests {