diff --git a/scripts/weekly_report.php b/scripts/weekly_report.php
index b28ef2e..e625d3a 100644
--- a/scripts/weekly_report.php
+++ b/scripts/weekly_report.php
@@ -210,7 +210,11 @@ while($detection=$result1->fetchArray(SQLITE3_ASSOC))
 			$totalcount = $result2->fetchArray(SQLITE3_ASSOC);
 			$priorweekcount = $totalcount['COUNT(*)'];
 
-			$percentagediff = round( (($scount - $priorweekcount) / $priorweekcount) * 100  );
+			if ($priorweekcount > 0) {
+				$percentagediff = round( (($scount - $priorweekcount) / $priorweekcount) * 100  );
+			} else {
+				$percentagediff = 0;
+			}
 
 			if($percentagediff > 0) {
 				$percentagediff = "<span style='color:green;font-size:small'>+".$percentagediff."%</span>";