diff --git a/src/main/java/Invert.java b/src/main/java/Invert.java
index a694242b27946f0332785106c6a94b7a782f9616..c5e6f85d4dbd175564f3f6d521a26fcbc0aed858 100644
--- a/src/main/java/Invert.java
+++ b/src/main/java/Invert.java
@@ -2,7 +2,7 @@ public class Invert implements transform {
 
     public void applyTo(GrayImage image) {
         for (int i = 0; i < image.getWidth(); i++) {
-            for (int j = 0; i < image.getHeight(); j++) {
+            for (int j = 0; j < image.getHeight(); j++) {
                 image.setPixel(image.getPixelGrayColor(i, j).invert(), i, j);
             }
         }