diff --git a/src/detector.c b/src/detector.c
index fc560f8048f..ba4d809b3a6 100644
--- a/src/detector.c
+++ b/src/detector.c
@@ -556,7 +556,7 @@ int detections_comparator(const void *pa, const void *pb)
     return 0;
 }
 
-void validate_detector_map(char *datacfg, char *cfgfile, char *weightfile, float thresh_calc_avg_iou)
+void validate_detector_map(char *datacfg, char *cfgfile, char *weightfile, float thresh_calc_avg_iou, const float iou_thresh)
 {
     int j;
     list *options = read_data_cfg(datacfg);
@@ -597,7 +597,7 @@ void validate_detector_map(char *datacfg, char *cfgfile, char *weightfile, float
 
     const float thresh = .005;
     const float nms = .45;
-    const float iou_thresh = 0.5;
+    //const float iou_thresh = 0.5;
 
     int nthreads = 4;
     image *val = calloc(nthreads, sizeof(image));
@@ -876,7 +876,12 @@ void validate_detector_map(char *datacfg, char *cfgfile, char *weightfile, float
         thresh_calc_avg_iou, tp_for_thresh, fp_for_thresh, unique_truth_count - tp_for_thresh, avg_iou * 100);
 
     mean_average_precision = mean_average_precision / classes;
-    printf("\n mean average precision (mAP) = %f, or %2.2f %% \n", mean_average_precision, mean_average_precision*100);
+    if (iou_thresh == 0.5) {
+        printf("\n mean average precision (mAP) = %f, or %2.2f %% \n", mean_average_precision, mean_average_precision * 100);
+    }
+    else {
+        printf("\n average precision (AP) = %f, or %2.2f %% for IoU threshold = %f \n", mean_average_precision, mean_average_precision * 100, iou_thresh);
+    }
 
 
     for (i = 0; i < classes; ++i) {
@@ -1235,6 +1240,7 @@ void run_detector(int argc, char **argv)
     char *outfile = find_char_arg(argc, argv, "-out", 0);
     char *prefix = find_char_arg(argc, argv, "-prefix", 0);
     float thresh = find_float_arg(argc, argv, "-thresh", .25);    // 0.24
+    float iou_thresh = find_float_arg(argc, argv, "-iou_thresh", .5);    // 0.5 for mAP
     float hier_thresh = find_float_arg(argc, argv, "-hier", .5);
     int cam_index = find_int_arg(argc, argv, "-c", 0);
     int frame_skip = find_int_arg(argc, argv, "-s", 0);
@@ -1285,7 +1291,7 @@ void run_detector(int argc, char **argv)
     else if(0==strcmp(argv[2], "train")) train_detector(datacfg, cfg, weights, gpus, ngpus, clear, dont_show);
     else if(0==strcmp(argv[2], "valid")) validate_detector(datacfg, cfg, weights, outfile);
     else if(0==strcmp(argv[2], "recall")) validate_detector_recall(datacfg, cfg, weights);
-    else if(0==strcmp(argv[2], "map")) validate_detector_map(datacfg, cfg, weights, thresh);
+    else if(0==strcmp(argv[2], "map")) validate_detector_map(datacfg, cfg, weights, thresh, iou_thresh);
     else if(0==strcmp(argv[2], "calc_anchors")) calc_anchors(datacfg, num_of_clusters, width, height, show);
     else if(0==strcmp(argv[2], "demo")) {
         list *options = read_data_cfg(datacfg);