diff -up cpu-1.4.3/src/plugins/ldap/ld.c.empty-attr cpu-1.4.3/src/plugins/ldap/ld.c
--- cpu-1.4.3/src/plugins/ldap/ld.c.empty-attr	2010-11-05 21:18:12.000000000 -0600
+++ cpu-1.4.3/src/plugins/ldap/ld.c	2010-11-05 21:19:48.000000000 -0600
@@ -282,7 +282,10 @@ ldapBuildListStr (int mod_op, char *mod_
 {
   char **temp;
 
-  if (value == NULL)
+  if (mod_type == NULL || strlen(mod_type) == strspn(mod_type, " "))
+    return mods;
+
+  if (value == NULL || strlen(value) == strspn(value, " "))
     return mods;
 
   mods = ldapAddList (mods);