diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/storage/dfs/DfsBlockCache.java b/org.eclipse.jgit/src/org/eclipse/jgit/storage/dfs/DfsBlockCache.java
index 6379b70a9..3ae9690d7 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/storage/dfs/DfsBlockCache.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/storage/dfs/DfsBlockCache.java
@@ -99,9 +99,8 @@ public final class DfsBlockCache {
 	/**
 	 * Modify the configuration of the window cache.
 	 * <p>
-	 * The new configuration is applied immediately. If the new limits are
-	 * smaller than what what is currently cached, older entries will be purged
-	 * as soon as possible to allow the cache to meet the new limit.
+	 * The new configuration is applied immediately, and the existing cache is
+	 * cleared.
 	 *
 	 * @param cfg
 	 *            the new window cache configuration.