diff --git a/Makefile b/Makefile
index 9db41a88..d71e2bdb 100644
--- a/Makefile
+++ b/Makefile
@@ -44,10 +44,12 @@ NVCC=nvcc
 OPTS=-Ofast
 LDFLAGS= -lm -pthread 
 COMMON= 
-CFLAGS=-Wall -Wfatal-errors -Wno-unused-result -Wno-unknown-pragmas -ffp-contract=fast -mavx
+CFLAGS=-Wall -Wfatal-errors -Wno-unused-result -Wno-unknown-pragmas
 
 ifeq ($(DEBUG), 1) 
 OPTS=-O0 -g
+else
+OPTS=-ffp-contract=fast -mavx
 endif
 
 CFLAGS+=$(OPTS)
diff --git a/src/detector.c b/src/detector.c
index 6d7689ef..06709c18 100644
--- a/src/detector.c
+++ b/src/detector.c
@@ -606,6 +606,7 @@ void validate_detector_map(char *datacfg, char *cfgfile, char *weightfile, float
 			int letterbox = (args.type == LETTERBOX_DATA);
 			float hier_thresh = 0;
 			detection *dets = get_network_boxes(&net, 1, 1, thresh, hier_thresh, 0, 0, &nboxes, letterbox);
+			//detection *dets = get_network_boxes(&net, val[t].w, val[t].h, thresh, hier_thresh, 0, 1, &nboxes, letterbox); // for letterbox=1
 			if (nms) do_nms_sort_v3(dets, nboxes, l.classes, nms);
 
 			char labelpath[4096];