diff --git a/examples/tm_yolact.cpp b/examples/tm_yolact.cpp
index d6e2263fe3b86d2bcfb502a5548a86cc2e844fa3..2f9bc008fc832ba99ac91ff631e730add75d1ab6 100644
--- a/examples/tm_yolact.cpp
+++ b/examples/tm_yolact.cpp
@@ -204,7 +204,7 @@ static void fast_nms(std::vector<std::vector<Object> >& class_candidates, std::v
         for (int j = 1; j < n; j++)
         {
             std::vector<float>::iterator max_value;
-            max_value = std::max_element(iou_matrix[j].begin(), iou_matrix[j].begin() + j - 1);
+            max_value = std::max_element(iou_matrix[j].begin(), iou_matrix[j].begin() + j);
             if (*max_value <= iou_thresh)
             {
                 objects.push_back(candidate[j]);
diff --git a/examples/tm_yolact_uint8.cpp b/examples/tm_yolact_uint8.cpp
index 630d1dfd1b80a5883316a566a0b03c76ccd45067..691cf4549816d37cb6d4f2de1605c78dbb05499c 100644
--- a/examples/tm_yolact_uint8.cpp
+++ b/examples/tm_yolact_uint8.cpp
@@ -212,7 +212,7 @@ static void fast_nms(std::vector<std::vector<Object> >& class_candidates, std::v
         for (int j = 1; j < n; j++)
         {
             std::vector<float>::iterator max_value;
-            max_value = std::max_element(iou_matrix[j].begin(), iou_matrix[j].begin() + j - 1);
+            max_value = std::max_element(iou_matrix[j].begin(), iou_matrix[j].begin() + j);
             if (*max_value <= iou_thresh)
             {
                 objects.push_back(candidate[j]);