diff --git a/core/src/main/java/hudson/ClassicPluginStrategy.java b/core/src/main/java/hudson/ClassicPluginStrategy.java
index 727bdd7fbd7e580006ac0ccc9099dafa4912354e..040e4cf98dfe3692de2a5d78fd6ad0ce2c4c3e36 100644
--- a/core/src/main/java/hudson/ClassicPluginStrategy.java
+++ b/core/src/main/java/hudson/ClassicPluginStrategy.java
@@ -342,7 +342,9 @@ public class ClassicPluginStrategy implements PluginStrategy {
             "script-security/matrix-auth",
             "script-security/windows-slaves",
             "script-security/antisamy-markup-formatter",
-            "script-security/matrix-project"
+            "script-security/matrix-project",
+            "credentials/matrix-auth",
+            "credentials/windows-slaves"
     ));
 
     /**