diff --git a/core/src/main/java/hudson/model/LargeText.java b/core/src/main/java/hudson/model/LargeText.java
index 835f4f93ff135f651ac0f8a3c12c2524f18d4505..ff238ed94751fe2a42d4c67be80b93427175aa3c 100644
--- a/core/src/main/java/hudson/model/LargeText.java
+++ b/core/src/main/java/hudson/model/LargeText.java
@@ -34,7 +34,7 @@ public class LargeText {
     }
     private final Source source;
 
-    private final boolean completed;
+    private volatile boolean completed;
 
     public LargeText(final File file, boolean completed) {
         this.source = new Source() {
@@ -70,6 +70,10 @@ public class LargeText {
         this.completed = completed;
     }
 
+    public void markAsComplete() {
+        completed = true;
+    }
+
     /**
      * Writes the tail portion of the file to the {@link Writer}.
      *
diff --git a/core/src/main/java/hudson/scm/CVSSCM.java b/core/src/main/java/hudson/scm/CVSSCM.java
index d1f0cb80a5990dccd26a71f487ffcdd429839e73..dd338012a76926527a519e3e920ba7f1e7b59433 100644
--- a/core/src/main/java/hudson/scm/CVSSCM.java
+++ b/core/src/main/java/hudson/scm/CVSSCM.java
@@ -1147,6 +1147,7 @@ public class CVSSCM extends AbstractCVSFamilySCM implements Serializable {
             }
 
             listener.getLogger().println("Completed");
+            text.markAsComplete();
         }
     }