diff --git a/examples/cpp/tutorial.cpp b/examples/cpp/tutorial.cpp
index 091dfab2d..25cc85c31 100644
--- a/examples/cpp/tutorial.cpp
+++ b/examples/cpp/tutorial.cpp
@@ -89,8 +89,8 @@ void automatic_differentiation() {
   // dfdx is 2 * x
 
   // Get the second derivative by composing grad with grad
-  auto df2dx2 = grad(grad(fn))(x);
-  // df2dx2 is 2
+  auto d2fdx2 = grad(grad(fn))(x);
+  // d2fdx2 is 2
 }
 
 int main() {