diff --git a/trivial-ldap.lisp b/trivial-ldap.lisp
index 899aef2..6174ac3 100644
--- a/trivial-ldap.lisp
+++ b/trivial-ldap.lisp
@@ -1739,7 +1739,11 @@ LIST-OF-MODS is a list of (type att val) triples."
 	(size   (seq-integer size))
 	(time   (seq-integer time))
 	(types  (seq-boolean types))
-	(attrs  (seq-attribute-list attrs))
+        (attrs
+          (seq-attribute-list (case attrs
+                                ((nil) '("1.1")) ; No attributes
+                                ((t)   nil)      ; All attributes
+                                (t     attrs)))) ; those requested
         (controls
           (when (and paging-size
                      (zerop size))