diff --git a/samples/bpf/lwt_len_hist.sh b/samples/bpf/lwt_len_hist.sh
old mode 100644
new mode 100755
index 090b96eaf7f7..0eda9754f50b
--- a/samples/bpf/lwt_len_hist.sh
+++ b/samples/bpf/lwt_len_hist.sh
@@ -8,6 +8,8 @@ VETH1=tst_lwt1b
 TRACE_ROOT=/sys/kernel/debug/tracing
 
 function cleanup {
+	# To reset saved histogram, remove pinned map
+	rm /sys/fs/bpf/tc/globals/lwt_len_hist_map
 	ip route del 192.168.253.2/32 dev $VETH0 2> /dev/null
 	ip link del $VETH0 2> /dev/null
 	ip link del $VETH1 2> /dev/null
diff --git a/samples/bpf/test_lwt_bpf.sh b/samples/bpf/test_lwt_bpf.sh
old mode 100644
new mode 100755