diff --git a/htdocs/core/class/html.form.class.php b/htdocs/core/class/html.form.class.php
index 1e1bbdf58d2..f753e8df157 100644
--- a/htdocs/core/class/html.form.class.php
+++ b/htdocs/core/class/html.form.class.php
@@ -5842,7 +5842,7 @@ class Form
 		}
 		elseif ($typehour == 'text' || $typehour == 'textselect')
 		{
-			$retstring .= '<input placeholder="'.$langs->trans('HourShort').'" type="number" min="0" size="1" name="'.$prefix.'hour"'.($disabled ? ' disabled' : '').' class="flat maxwidth50 inputhour" value="'.(($hourSelected != '') ? ((int) $hourSelected) : '').'">';
+			$retstring .= '<input placeholder="'.$langs->trans('HourShort').'" type="number" min="0" name="'.$prefix.'hour"'.($disabled ? ' disabled' : '').' class="flat maxwidth50 inputhour" value="'.(($hourSelected != '') ? ((int) $hourSelected) : '').'">';
 		}
 		else return 'BadValueForParameterTypeHour';
 
@@ -5866,7 +5866,7 @@ class Form
 		}
 		elseif ($typehour == 'text')
 		{
-			$retstring .= '<input placeholder="'.$langs->trans('MinuteShort').'" type="number" min="0" size="1" name="'.$prefix.'min"'.($disabled ? ' disabled' : '').' class="flat maxwidth50 inputminute" value="'.(($minSelected != '') ? ((int) $minSelected) : '').'">';
+			$retstring .= '<input placeholder="'.$langs->trans('MinuteShort').'" type="number" min="0" name="'.$prefix.'min"'.($disabled ? ' disabled' : '').' class="flat maxwidth50 inputminute" value="'.(($minSelected != '') ? ((int) $minSelected) : '').'">';
 		}
 
 		if ($typehour != 'text') $retstring .= ' '.$langs->trans('MinuteShort');