diff --git a/core/src/main/java/hudson/security/LDAPSecurityRealm.java b/core/src/main/java/hudson/security/LDAPSecurityRealm.java
index 338a9e1..0a97e97 100644
--- a/core/src/main/java/hudson/security/LDAPSecurityRealm.java
+++ b/core/src/main/java/hudson/security/LDAPSecurityRealm.java
@@ -57,6 +57,7 @@ public class LDAPSecurityRealm extends SecurityRealm {
     }
 
     static {
-//        LIST.add(DESCRIPTOR);
+        if(Boolean.getBoolean("LDAP"))
+            LIST.add(DESCRIPTOR);
     }
 }