diff --git a/app/call_center/call_center_agent_edit.php b/app/call_center/call_center_agent_edit.php
index 47b22e2bfe..49b78c9dd6 100644
--- a/app/call_center/call_center_agent_edit.php
+++ b/app/call_center/call_center_agent_edit.php
@@ -386,7 +386,7 @@ if (count($_POST)>0 && strlen($_POST["persistformvar"]) == 0) {
 	echo "	".$text['label-call_timeout']."\n";
 	echo "</td>\n";
 	echo "<td class='vtable' align='left'>\n";
-	echo "  <input class='formfld' type='number' name='agent_call_timeout' onmouseover="this.type='text';" onfocus="this.type='text';" onmouseout="if (!$(this).is(':focus')) { this.type='password'; }" onblur="this.type='password';" autocomplete='off' maxlength='255' min='1' step='1' value='$agent_call_timeout'>\n";
+	echo "  <input class='formfld' type='number' name='agent_call_timeout' onmouseover=\"this.type='text';\" onfocus=\"this.type='text';\" onmouseout=\"if (!\$(this).is(':focus')) { this.type='password'; }\" onblur=\"this.type='password';\" autocomplete='off' maxlength='255' min='1' step='1' value='$agent_call_timeout'>\n";
 	echo "<br />\n";
 	echo $text['description-call_timeout']."\n";
 	echo "</td>\n";