diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/revwalk/MergeBaseGenerator.java b/org.eclipse.jgit/src/org/eclipse/jgit/revwalk/MergeBaseGenerator.java
index 735f7d602..3942ab2b7 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/revwalk/MergeBaseGenerator.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/revwalk/MergeBaseGenerator.java
@@ -138,7 +138,6 @@ class MergeBaseGenerator extends Generator {
 			final RevCommit c = pending.next();
 			if (c == null) {
 				walker.reader.walkAdviceEnd();
-				walker.reader.release();
 				return null;
 			}