diff --git a/core/src/com/google/zxing/datamatrix/detector/Detector.java b/core/src/com/google/zxing/datamatrix/detector/Detector.java
index a22db6042..aa81d8cb1 100644
--- a/core/src/com/google/zxing/datamatrix/detector/Detector.java
+++ b/core/src/com/google/zxing/datamatrix/detector/Detector.java
@@ -237,6 +237,9 @@ public final class Detector {
       if (error > 0) {
         y += ystep;
         error -= dx;
+        if (y == toY) {
+          break;
+        }
       }
     }
     return new ResultPointsAndTransitions(from, to, transitions);