diff --git a/htdocs/compta/facture/stats/index.php b/htdocs/compta/facture/stats/index.php
index c100263ac7f..ba787b46307 100644
--- a/htdocs/compta/facture/stats/index.php
+++ b/htdocs/compta/facture/stats/index.php
@@ -380,11 +380,11 @@ foreach ($data as $val) {
 	print '<tr class="oddeven" height="24">';
 	print '<td align="center"><a href="'.$_SERVER["PHP_SELF"].'?year='.$year.'&amp;mode='.$mode.($socid > 0 ? '&socid='.$socid : '').($userid > 0 ? '&userid='.$userid : '').'">'.$year.'</a></td>';
 	print '<td class="right">'.$val['nb'].'</td>';
-	print '<td class="right opacitylow" style="'.((!empty($val['nb_diff']) && $val['nb_diff'] >= 0) ? 'color: green;' : 'color: red;').'">'.(!empty($val['nb_diff']) && $val['nb_diff'] < 0 ? '' : '+').round(!empty($val['nb_diff']) ? $val['nb_diff'] : 0).'%</td>';
+	print '<td class="right opacitylow" style="'.((empty($val['nb_diff']) || $val['nb_diff'] >= 0) ? 'color: green;' : 'color: red;').'">'.(!empty($val['nb_diff']) && $val['nb_diff'] < 0 ? '' : '+').round(!empty($val['nb_diff']) ? $val['nb_diff'] : 0).'%</td>';
 	print '<td class="right"><span class="amount">'.price(price2num($val['total'], 'MT'), 1).'</span></td>';
-	print '<td class="right opacitylow" style="'.((!empty($val['total_diff']) && $val['total_diff'] >= 0) ? 'color: green;' : 'color: red;').'">'.( !empty($val['total_diff']) && $val['total_diff'] < 0 ? '' : '+').round(!empty($val['total_diff']) ? $val['total_diff'] : 0).'%</td>';
+	print '<td class="right opacitylow" style="'.((empty($val['total_diff']) || $val['total_diff'] >= 0) ? 'color: green;' : 'color: red;').'">'.( !empty($val['total_diff']) && $val['total_diff'] < 0 ? '' : '+').round(!empty($val['total_diff']) ? $val['total_diff'] : 0).'%</td>';
 	print '<td class="right"><span class="amount">'.price(price2num($val['avg'], 'MT'), 1).'</span></td>';
-	print '<td class="right opacitylow" style="'.((!empty($val['avg_diff']) && $val['avg_diff'] >= 0) ? 'color: green;' : 'color: red;').'">'.(!empty($val['avg_diff']) && $val['avg_diff'] < 0 ? '' : '+').round(!empty($val['avg_diff']) ? $val['avg_diff'] : 0).'%</td>';
+	print '<td class="right opacitylow" style="'.((empty($val['avg_diff']) || $val['avg_diff'] >= 0) ? 'color: green;' : 'color: red;').'">'.(!empty($val['avg_diff']) && $val['avg_diff'] < 0 ? '' : '+').round(!empty($val['avg_diff']) ? $val['avg_diff'] : 0).'%</td>';
 	print '</tr>';
 	$oldyear = $year;
 }