diff --git a/src/main/java/br/com/rafael/math/vector/Vector3D.java b/src/main/java/br/com/rafael/math/vector/Vector3D.java
index 8b4ab7d..85b41ff 100644
--- a/src/main/java/br/com/rafael/math/vector/Vector3D.java
+++ b/src/main/java/br/com/rafael/math/vector/Vector3D.java
@@ -158,7 +158,7 @@ public double distance(Vector3D other) {
   }
   
   public double dot(Vector3D other) {
-    return Math.sqrt(this._x * other._x + this._y * other._y + this._z * other._z);
+    return this._x * other._x + this._y * other._y + this._z * other._z;
   }
   
   public Vector3D crossMe(Vector3D other) {