diff --git a/extensions/guacamole-auth-ldap/src/main/java/org/glyptodon/guacamole/auth/ldap/user/UserService.java b/extensions/guacamole-auth-ldap/src/main/java/org/glyptodon/guacamole/auth/ldap/user/UserService.java
index 0f01bde36..5761b6184 100644
--- a/extensions/guacamole-auth-ldap/src/main/java/org/glyptodon/guacamole/auth/ldap/user/UserService.java
+++ b/extensions/guacamole-auth-ldap/src/main/java/org/glyptodon/guacamole/auth/ldap/user/UserService.java
@@ -211,6 +211,9 @@ public class UserService {
         if (usernameAttributes.size() > 1)
             ldapQuery.append(")");
 
+        // Close overall query (AND clause)
+        ldapQuery.append(")");
+
         return ldapQuery.toString();
 
     }