diff --git a/app/views/pools/_search.html.erb b/app/views/pools/_search.html.erb
index 9c0f30779..eee19ac37 100644
--- a/app/views/pools/_search.html.erb
+++ b/app/views/pools/_search.html.erb
@@ -32,7 +32,7 @@
         <th><label for="search_category">Category</th>
         <td>
           <div class="input">
-            <%= select "search", "category", [["Series", "series"], ["Collection", "collection"]], :selected => params[:search][:category] %>
+            <%= select "search", "category", [["Series", "series"], ["Collection", "collection"]], :selected => params[:search][:category], :include_blank => true %>
           </div>
         </td>
       </tr>