diff --git a/htdocs/core/boxes/box_graph_propales_permonth.php b/htdocs/core/boxes/box_graph_propales_permonth.php
index 7179f255add..78cbadc6fb2 100644
--- a/htdocs/core/boxes/box_graph_propales_permonth.php
+++ b/htdocs/core/boxes/box_graph_propales_permonth.php
@@ -195,7 +195,7 @@ class box_graph_propales_permonth extends ModeleBoxes
 					{
 						if ($startmonth != 0)
 						{
-							$legend[]=sprintf("%d/%d",$i-2001, $i-2000);
+                            $legend[]=sprintf("%d/%d", $i-2001, $i-2000);
 						}
 						else
 						{
diff --git a/htdocs/core/class/stats.class.php b/htdocs/core/class/stats.class.php
index a15800f8ce6..85a6f43ed4d 100644
--- a/htdocs/core/class/stats.class.php
+++ b/htdocs/core/class/stats.class.php
@@ -106,7 +106,7 @@ abstract class Stats
 				$year=$startyear;
 				while($year <= $endyear)
 				{
-					$data[$i][]=$datay[$year - (1 - (int) (($i+$startmonth)/12)) + ($startmonth == 0 ? 1 : 0)][($i+$startmonth)%12][1];
+					$data[$i][]=$datay[$year - (1 - ((int) ($i+$startmonth)/12) + ($startmonth == 0 ? 1 : 0))][($i+$startmonth)%12][1];
 					$year++;
 				}
 			}
@@ -206,7 +206,7 @@ abstract class Stats
 				$year=$startyear;
 				while($year <= $endyear)
 				{
-					$data[$i][]=$datay[$year - (1 - (int) (($i+$startmonth)/12)) + ($startmonth == 0 ? 1 : 0)][($i+$startmonth)%12][1];	// set yval for x=i
+					$data[$i][]=$datay[$year - (1 - ((int) ($i+$startmonth)/12) + ($startmonth == 0 ? 1 : 0))][($i+$startmonth)%12][1];	// set yval for x=i
 					$year++;
 				}
 			}