diff --git a/htdocs/projet/tasks/time.php b/htdocs/projet/tasks/time.php
index 8c98e6387b1..6652b57304a 100644
--- a/htdocs/projet/tasks/time.php
+++ b/htdocs/projet/tasks/time.php
@@ -1629,16 +1629,20 @@ if (($id > 0 || !empty($ref)) || $projectidforalltimes > 0 || $allprojectforuser
 			$sql .= " AND t.task_date <= '".$db->idate($search_date_end)."'";
 		}
 
-		if($search_timespent_starthour || $search_timespent_startmin) {
-			$timespent_duration_start = $search_timespent_starthour * 60 * 60; // We store duration in seconds
-			$timespent_duration_start += ($search_timespent_startmin ? $search_timespent_startmin : 0) * 60; // We store duration in seconds
-			$sql .= " AND t.task_duration >= ".$timespent_duration_start;
-		}
+		if (!empty($arrayfields['t.task_duration']['checked'])) {
 
-		if($search_timespent_endhour || $search_timespent_endmin) {
-			$timespent_duration_end = $search_timespent_endhour * 60 * 60; // We store duration in seconds
-			$timespent_duration_end += ($search_timespent_endmin ? $search_timespent_endmin : 0) * 60; // We store duration in seconds
-			$sql .= " AND t.task_duration <= ".$timespent_duration_end;
+			if ($search_timespent_starthour || $search_timespent_startmin) {
+				$timespent_duration_start = $search_timespent_starthour * 60 * 60; // We store duration in seconds
+				$timespent_duration_start += ($search_timespent_startmin ? $search_timespent_startmin : 0) * 60; // We store duration in seconds
+				$sql .= " AND t.task_duration >= " . $timespent_duration_start;
+			}
+
+			if ($search_timespent_endhour || $search_timespent_endmin) {
+				$timespent_duration_end = $search_timespent_endhour * 60 * 60; // We store duration in seconds
+				$timespent_duration_end += ($search_timespent_endmin ? $search_timespent_endmin : 0) * 60; // We store duration in seconds
+				$sql .= " AND t.task_duration <= " . $timespent_duration_end;
+			}
+			
 		}
 
 		$sql .= dolSqlDateFilter('t.task_datehour', $search_day, $search_month, $search_year);