diff --git a/core/src/main/java/hudson/security/PAMSecurityRealm.java b/core/src/main/java/hudson/security/PAMSecurityRealm.java
index 44e20294c3..425fc27417 100644
--- a/core/src/main/java/hudson/security/PAMSecurityRealm.java
+++ b/core/src/main/java/hudson/security/PAMSecurityRealm.java
@@ -142,7 +142,7 @@ public class PAMSecurityRealm extends SecurityRealm {
                 else            group=String.valueOf(st.gid());
                 return FormValidation.error(user+" needs to belong to group "+group+" to read /etc/shadow");
             }
-            return FormValidation.ok();
+            return FormValidation.ok("Success");
         }
     }