diff --git a/algorithms-sorting/src/main/java/com/baeldung/algorithms/mergesort/MergeSort.java b/algorithms-sorting/src/main/java/com/baeldung/algorithms/mergesort/MergeSort.java
index 0deb48b6a0..945b4ffd7e 100644
--- a/algorithms-sorting/src/main/java/com/baeldung/algorithms/mergesort/MergeSort.java
+++ b/algorithms-sorting/src/main/java/com/baeldung/algorithms/mergesort/MergeSort.java
@@ -34,7 +34,7 @@ public class MergeSort {
 
         while (i < left && j < right) {
 
-            if (l[i] < r[j])
+            if (l[i] <= r[j])
                 a[k++] = l[i++];
             else
                 a[k++] = r[j++];