diff --git a/core/src/main/java/hudson/ClassicPluginStrategy.java b/core/src/main/java/hudson/ClassicPluginStrategy.java
index 62018e8f809dc3174469603b8b59afe57a61444c..261a92892abf67ffc9d07dca50c6f34e79b7b895 100644
--- a/core/src/main/java/hudson/ClassicPluginStrategy.java
+++ b/core/src/main/java/hudson/ClassicPluginStrategy.java
@@ -272,7 +272,8 @@ public class ClassicPluginStrategy implements PluginStrategy {
         new DetachedPlugin("mailer","1.493.*","1.2"),
         new DetachedPlugin("matrix-auth","1.535.*","1.0.2"),
         new DetachedPlugin("windows-slaves","1.547.*","1.0"),
-        new DetachedPlugin("antisamy-markup-formatter","1.553.*","1.0")
+        new DetachedPlugin("antisamy-markup-formatter","1.553.*","1.0"),
+        new DetachedPlugin("matrix-project","1.561.*","1.0")
     );
 
     /**