diff --git a/build.xml b/build.xml
index b9cce4b..96c811b 100644
--- a/build.xml
+++ b/build.xml
@@ -57,6 +57,7 @@
             patches/8745-draft.diff
             patches/8770.diff
             patches/8827.diff
+            patches/8856-draft.diff
             patches/disable-error-notification.diff
             patches/mvn-sh.diff
             patches/project-marker-jdk.diff
diff --git a/patches/8856-draft.diff b/patches/8856-draft.diff
new file mode 100644
index 0000000..b02e23e
--- /dev/null
+++ b/patches/8856-draft.diff
@@ -0,0 +1,15 @@
+diff --git a/java/java.sourceui/src/org/netbeans/api/java/source/ui/ElementOpen.java b/java/java.sourceui/src/org/netbeans/api/java/source/ui/ElementOpen.java
+index f561cb51c8..81000c3ed9 100644
+--- a/java/java.sourceui/src/org/netbeans/api/java/source/ui/ElementOpen.java
++++ b/java/java.sourceui/src/org/netbeans/api/java/source/ui/ElementOpen.java
+@@ -573,6 +573,10 @@ public final class ElementOpen {
+         int[] span = null;
+         switch(forTree.getKind()) {
+             case CLASS:
++                if ((int) target[1] >= 0 && (int) target[2] == -1) {
++                // Compact Source file (JEP 512)  issue implicit class end position not found in code 
++                    target[2] = (int) info.getTrees().getSourcePositions().getEndPosition(cu, cu);
++                }
+             case INTERFACE:
+             case ENUM:
+             case ANNOTATION_TYPE: