diff --git a/make-gdb-connect.sh b/make-gdb-connect.sh
index 8e51028..f248661 100755
--- a/make-gdb-connect.sh
+++ b/make-gdb-connect.sh
@@ -1,6 +1,7 @@
 #!/bin/sh
 # Generate gdb-connect script with given RTT block address, to avoid typing it in manually
 
+# Hint from this answer https://superuser.com/a/747905/355774
 [ $# -ge 1 ] && ADDR="$1" || ADDR=$(cat)
 
 cat <<EOF > gdb-connect