diff --git a/README.md b/README.md
index 75990e9..cf6646b 100755
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ recommended where possible, is from a USB GPS receiver that supports the [NMEA
 0183](https://en.wikipedia.org/wiki/NMEA_0183) protocol. (A handheld GPS
 receiver connected to a computer may or may not work; it does not work with my
 Garmin GPSMAP 64st. Any common USB GPS dongle, such as [this one available from
-Amazon](https://www.amazon.com/VK-162-G-Mouse-External-Navigation-Raspberry/dp/B01EROIUEW/)
+Amazon](https://www.amazon.com/VK-162-G-Mouse-External-Navigation-Raspberry/dp/B01EROIUEW/),
 should work, although, of course, I cannot guarantee that any particular device
 will be compatible with Navpoint. On Windows, USB mode should work
 out-of-the-box with a compatible GPS receiver; on Linux, your user account