diff --git a/tpl/Poll/Voters.latte b/tpl/Poll/Voters.latte
index 57a9a38..6046043 100755
--- a/tpl/Poll/Voters.latte
+++ b/tpl/Poll/Voters.latte
@@ -11,7 +11,7 @@
 
 {block tabs}
     <div n:foreach="$options as $optionId => $optionName" class="tab" id="{$optionId == $option[0] ? 'activetabs' : 'ki'}">
-        <a id="{$optionId == $option[0] ? 'act_tab_a' : ''}" href="/poll{$pollId}/voters?option={base_convert($optionId, 10, 32)}">{$optionName}</a>
+        <a id="{$optionId == $option[0] ? 'act_tab_a' : ''}" href="/poll{$pollId}/voters?option={base_convert((string)$optionId, 10, 32)}">{$optionName}</a>
     </div>
 {/block}