diff --git a/htdocs/advancedsearch.php b/htdocs/advancedsearch.php
index 82acd0b..60ba943 100644
--- a/htdocs/advancedsearch.php
+++ b/htdocs/advancedsearch.php
@@ -100,7 +100,13 @@
                     } else {
                         $value = '*' . ldap_escape($value, "", LDAP_ESCAPE_FILTER) . '*';
                     }
+                    if (isset($_POST[$item."negates"]) and ($_POST[$item."negates"] == 'true')) {
+                        $ldap_filter .= "(!";
+                    }
                     $ldap_filter .= "($attribute=$value)";
+                    if (isset($_POST[$item."negates"]) and ($_POST[$item."negates"] == 'true')) {
+                        $ldap_filter .= ")";
+                    }
                 }
             }
         }
diff --git a/lang/en.inc.php b/lang/en.inc.php
index b8d6ed2..3995c57 100644
--- a/lang/en.inc.php
+++ b/lang/en.inc.php
@@ -57,6 +57,7 @@
 $messages['logout'] = "Logout";
 $messages['noentriesfound'] = "No entries found";
 $messages['notdefined'] = "Not defined";
+$messages['negates'] = "Check to negates this value";
 $messages['search'] = "Search";
 $messages['search_object'] = "Objects to search";
 $messages['searchrequired'] = "Please enter your search";
diff --git a/lang/fr.inc.php b/lang/fr.inc.php
index 35d0c3d..5b81775 100644
--- a/lang/fr.inc.php
+++ b/lang/fr.inc.php
@@ -57,6 +57,7 @@
 $messages['logout'] = "Déconnexion";
 $messages['noentriesfound'] = "Aucune entrée trouvée";
 $messages['notdefined'] = "Non renseigné";
+$messages['negates'] = "Cocher la case pour nier la valeur";
 $messages['search'] = "Rechercher";
 $messages['search_object'] = "Objets à rechercher";
 $messages['searchrequired'] = "Veuillez saisir votre recherche";
diff --git a/lang/it.inc.php b/lang/it.inc.php
index 081faf4..1f7ed3c 100644
--- a/lang/it.inc.php
+++ b/lang/it.inc.php
@@ -57,6 +57,7 @@
 $messages['logout'] = "Esci";
 $messages['noentriesfound'] = "Nessun record trovato";
 $messages['notdefined'] = "Non definito";
+$messages['negates'] = "Check to negates this value";
 $messages['search'] = "Cerca";
 $messages['search_object'] = "Oggetti da cercare";
 $messages['searchrequired'] = "Inserisci il termine di ricerca";
diff --git a/templates/search_displayer.tpl b/templates/search_displayer.tpl
index 8bf6f67..8357c62 100644
--- a/templates/search_displayer.tpl
+++ b/templates/search_displayer.tpl
@@ -16,6 +16,8 @@
             <input type="text" class="form-control" id="{$item}to" name="{$item}to" data-provide="datepicker" data-date-language="{$lang}">
             {elseif $type eq 'guid' or $type eq 'dn_link' or $type eq 'group_dn_link' or $type eq 'usergroup_dn_link' }
             <input type="text" class="form-control" id="{$item}" name="{$item}" placeholder="{$label}">
+            <span class="input-group-addon btn-info"><input type="checkbox" name="{$item}match" value="exact" data-toggle="popover" data-content="{$msg_exactmatch}"></span>
+            <span class="input-group-addon btn-danger"><input type="checkbox" name="{$item}negates" value="true" data-toggle="popover" data-content="{$msg_negates}"></span>
             {elseif $type eq 'list'}
             <select class="form-control" id="{$item}" name="{$item}" placeholder="{$label}">
                 <option></option>
@@ -23,12 +25,16 @@
                 <option value="{$value@key}">{$value}</option>
                 {/foreach}
             </select>
-            <span class="input-group-addon"><input type="checkbox" name="{$item}match" value="exact" data-toggle="popover" data-content="{$msg_exactmatch}"></span>
+            <span class="input-group-addon btn-info"><input type="checkbox" name="{$item}match" value="exact" data-toggle="popover" data-content="{$msg_exactmatch}"></span>
+            <span class="input-group-addon btn-danger"><input type="checkbox" name="{$item}negates" value="true" data-toggle="popover" data-content="{$msg_negates}"></span>
             {elseif $type eq 'bytes'}
             <input type="number" class="form-control" id="{$item}" name="{$item}" placeholder="{$label}">
+            <span class="input-group-addon btn-info"><input type="checkbox" name="{$item}match" value="exact" data-toggle="popover" data-content="{$msg_exactmatch}"></span>
+            <span class="input-group-addon btn-danger"><input type="checkbox" name="{$item}negates" value="true" data-toggle="popover" data-content="{$msg_negates}"></span>
             {else}
             <input type="text" class="form-control" id="{$item}" name="{$item}" placeholder="{$label}">
-            <span class="input-group-addon"><input type="checkbox" name="{$item}match" value="exact" data-toggle="popover" data-content="{$msg_exactmatch}"></span>
+            <span class="input-group-addon btn-info"><input type="checkbox" name="{$item}match" value="exact" data-toggle="popover" data-content="{$msg_exactmatch}"></span>
+            <span class="input-group-addon btn-danger"><input type="checkbox" name="{$item}negates" value="true" data-toggle="popover" data-content="{$msg_negates}"></span>
             {/if}
         </div>
     </div>