diff --git a/core/src/main/java/org/springframework/security/ldap/populator/UserDetailsServiceLdapAuthoritiesPopulator.java b/core/src/main/java/org/springframework/security/ldap/populator/UserDetailsServiceLdapAuthoritiesPopulator.java
new file mode 100644
index 0000000000..98365f807b
--- /dev/null
+++ b/core/src/main/java/org/springframework/security/ldap/populator/UserDetailsServiceLdapAuthoritiesPopulator.java
@@ -0,0 +1,23 @@
+package org.springframework.security.ldap.populator;
+
+import org.springframework.security.ldap.LdapAuthoritiesPopulator;
+import org.springframework.security.GrantedAuthority;
+import org.springframework.security.userdetails.UserDetailsService;
+import org.springframework.ldap.core.DirContextOperations;
+
+/**
+ * @author Luke Taylor
+ * @version $Id$
+ * @since 2.0
+ */
+public class UserDetailsServiceLdapAuthoritiesPopulator implements LdapAuthoritiesPopulator {
+    private UserDetailsService userService;
+
+    public UserDetailsServiceLdapAuthoritiesPopulator(UserDetailsService userService) {
+        this.userService = userService;
+    }
+
+    public GrantedAuthority[] getGrantedAuthorities(DirContextOperations userData, String username) {
+        return userService.loadUserByUsername(username).getAuthorities();
+    }
+}