diff --git a/PythonAPI/pycocotools/cocoeval.py b/PythonAPI/pycocotools/cocoeval.py
index f4e3decb..fd91f347 100644
--- a/PythonAPI/pycocotools/cocoeval.py
+++ b/PythonAPI/pycocotools/cocoeval.py
@@ -419,7 +419,7 @@ def accumulate(self, p = None):
         toc = time.time()
         print('DONE (t={:0.2f}s).'.format( toc-tic))
 
-    def summarize(self):
+    def summarize(self, main_iou):
         '''
         Compute and display summary metrics for evaluation results.
         Note this functin can *only* be applied on the default parameter setting
@@ -458,7 +458,7 @@ def _summarize( ap=1, iouThr=None, areaRng='all', maxDets=100 ):
         def _summarizeDets():
             stats = np.zeros((12,))
             stats[0] = _summarize(1)
-            stats[1] = _summarize(1, iouThr=.5, maxDets=self.params.maxDets[2])
+            stats[1] = _summarize(1, iouThr=main_iou, maxDets=self.params.maxDets[2])
             stats[2] = _summarize(1, iouThr=.75, maxDets=self.params.maxDets[2])
             stats[3] = _summarize(1, areaRng='small', maxDets=self.params.maxDets[2])
             stats[4] = _summarize(1, areaRng='medium', maxDets=self.params.maxDets[2])