diff --git a/src/Yolo.cpp b/src/Yolo.cpp
index deffbeb..db14774 100644
--- a/src/Yolo.cpp
+++ b/src/Yolo.cpp
@@ -278,6 +278,7 @@ void Yolo::mergeDetections(Yolo::detection *dets, int ndets, int classes, double
     }
     total = k+1;
 
+    float thresh = 0.45f;
     for(k = 0; k < classes; ++k){
         for(i = 0; i < total; ++i){
             dets[i].sort_class = k;
@@ -288,9 +289,9 @@ void Yolo::mergeDetections(Yolo::detection *dets, int ndets, int classes, double
             box a = dets[i].bbox;
             for(j = i+1; j < total; ++j){
                 box b = dets[j].bbox;
-                if (nsm_kind == GREEDY_NMS && yolo_box_iou(a, b) > nms_thresh)
+                if (nsm_kind == GREEDY_NMS && yolo_box_iou(a, b) > thresh)
                     dets[j].prob[k] = 0;
-                else if (nsm_kind == DIOU_NMS && yolo_box_diou(a, b, nms_thresh) > nms_thresh)
+                else if (nsm_kind == DIOU_NMS && yolo_box_diou(a, b, nms_thresh) > thresh)
                     dets[j].prob[k] = 0;
             }
         }