diff --git a/Appendix-A:-Printed-circuit-boards.md b/Appendix-A:-Printed-circuit-boards.md
index c2e1910..8006daa 100644
--- a/Appendix-A:-Printed-circuit-boards.md
+++ b/Appendix-A:-Printed-circuit-boards.md
@@ -13,7 +13,7 @@ Getting the Ploopy Trackball boards made can be complex, and expensive, especial
 Just something to consider. You're smart. You'll figure it out.
 
 # Making your own boards
-Want to make your own Ploopy Mouse boards? Great! Less work for us. Seriously, though, only choose this option if you know what you're doing. You don't want to embarrass yourself, do you?
+Want to make your own Ploopy Trackball boards? Great! Less work for us. Seriously, though, only choose this option if you know what you're doing. You don't want to embarrass yourself, do you?
 
 ## Step 1: Order the PCBs from a PCB production company