diff --git a/exercise-loops-and-functions.go b/exercise-loops-and-functions.go
index 6b8995a..32885c4 100644
--- a/exercise-loops-and-functions.go
+++ b/exercise-loops-and-functions.go
@@ -7,7 +7,7 @@ import (
 
 func Sqrt(x float64) float64 {
     var p float64
-    for z := 1.0; z != p; z -= (z * z - x) / (2 * z) {
+    for z := 1.0; z != p && math.Abs(z - p) > 0.000000000000001; z -= (z * z - x) / (2 * z) {
         p = z
     }
     return p