diff --git a/htdocs/core/class/html.form.class.php b/htdocs/core/class/html.form.class.php
index bd87fda5799..41ac0391168 100644
--- a/htdocs/core/class/html.form.class.php
+++ b/htdocs/core/class/html.form.class.php
@@ -4676,7 +4676,7 @@ class Form
 
 		$out='';
 		$out.= '<select class="flat" name="'.$htmlname.'" id="'.$htmlname.'">';
-		if ($useempty) $out .= '<option value=""></option>';
+		if ($useempty) $out .= '<option value="">&nbsp;</option>';
 		// If company current currency not in table, we add it into list. Should always be available.
 		if (! in_array($conf->currency, $TCurrency))
 		{