diff --git a/api/app/lib/controllers/overview/management.js b/api/app/lib/controllers/overview/management.js
index fdece6e6..c97d3a35 100644
--- a/api/app/lib/controllers/overview/management.js
+++ b/api/app/lib/controllers/overview/management.js
@@ -19,7 +19,10 @@ async function overSpeedList (ctx) {
 
         const overSpeedProcessedCount = await models.Overspeed.count({
             where: {
-                processingTime: { $ne: null }
+                $and: [
+                    { processingTime: { $ne: null } },
+                    { processingTime: { $ne: '' } }
+                ]
             }
         })