diff --git a/04-fibonacci/index.js b/04-fibonacci/index.js
index 953d539..a203513 100644
--- a/04-fibonacci/index.js
+++ b/04-fibonacci/index.js
@@ -2,15 +2,15 @@ export function fibonacci(value) {
   if(value == 0) return 0;
   if(value == 1 || value == 2) return 1;
 
-  let valorFib = value;
-  let valorFibAnterior1 = 0;
-  let valorFibAnterior2 = 1;
+  let fib;
+  let valorAnterior1 = 0;
+  let valorAnterior2 = 1;
 
   for(let i = 2 ; i <= value ; i++) {
-    valorFib = valorFibAnterior1 + valorFibAnterior2;
-    valorFibAnterior1 = valorFibAnterior2;
-    valorFibAnterior2 = valorFib;
+    fib = valorAnterior1 + valorAnterior2;
+    valorAnterior1 = valorAnterior2;
+    valorAnterior2 = fib;
   }
 
-  return valorFib;
+  return fib;
 }
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