diff --git a/src/return_values/challenges.md b/src/return_values/challenges.md
index e33720d..41d093c 100644
--- a/src/return_values/challenges.md
+++ b/src/return_values/challenges.md
@@ -77,7 +77,7 @@ double multiply(double x, double y) {
 void main() {
     int x = 5;
     int y = 8;
-    int z = subtractInt(add(4, 5), mul(4, 2));
+    int z = subtractInt(add(4, 5), multiply(4, 2));
 
     System.out.println(z);
 }