diff --git a/fibonacci/fibonacci.js b/fibonacci/fibonacci.js
index af8ba1b..4a75359 100644
--- a/fibonacci/fibonacci.js
+++ b/fibonacci/fibonacci.js
@@ -4,6 +4,9 @@ const fibonacci = function(count) {
   let a = 0;
   let b = 1;
   for (let i = 1; i < count; i++) {
+    const temp = b;
+    b = a + b;
+    a = temp;
     // A slightly shorter version of the above solution:
     // [a, b] = [b, a + b];
   }