diff --git a/bundles/sirix-core/src/main/java/io/sirix/diff/algorithm/fmse/ConnectionMap.java b/bundles/sirix-core/src/main/java/io/sirix/diff/algorithm/fmse/ConnectionMap.java
index 7fdb49ad3..5f34e2a24 100644
--- a/bundles/sirix-core/src/main/java/io/sirix/diff/algorithm/fmse/ConnectionMap.java
+++ b/bundles/sirix-core/src/main/java/io/sirix/diff/algorithm/fmse/ConnectionMap.java
@@ -63,7 +63,7 @@ public ConnectionMap(final ConnectionMap<T> map) {
    */
   public void set(final T origin, final T destination, final boolean bool) {
     requireNonNull(destination);
-    map.computeIfAbsent(requireNonNull(origin), () -> map.put(origin, new HashMap<>()));
+    map.computeIfAbsent(requireNonNull(origin), o -> map.put(o, new HashMap<>()));
     map.get(origin).put(destination, bool);
   }
 
diff --git a/bundles/sirix-core/src/main/java/io/sirix/diff/algorithm/fmse/LabelFMSEVisitor.java b/bundles/sirix-core/src/main/java/io/sirix/diff/algorithm/fmse/LabelFMSEVisitor.java
index 778d46467..56b1e3cc5 100644
--- a/bundles/sirix-core/src/main/java/io/sirix/diff/algorithm/fmse/LabelFMSEVisitor.java
+++ b/bundles/sirix-core/src/main/java/io/sirix/diff/algorithm/fmse/LabelFMSEVisitor.java
@@ -95,7 +95,7 @@ public VisitResultType visit(final ImmutableText node) {
    */
   private void addLeafLabel() {
     final NodeKind nodeKind = rtx.getKind();
-    leafLabels.computeIfAbsent(nodeKind, () -> leafLabels.put(nodeKind, new ArrayList<>()));
+    leafLabels.computeIfAbsent(nodeKind, nk -> leafLabels.put(nk, new ArrayList<>()));
     leafLabels.get(nodeKind).add(rtx.getNodeKey());
   }