diff --git a/Ploopy-Trackball-Kit-Assembly.md b/Ploopy-Trackball-Kit-Assembly.md
index e8fbdcb..10f269b 100644
--- a/Ploopy-Trackball-Kit-Assembly.md
+++ b/Ploopy-Trackball-Kit-Assembly.md
@@ -178,7 +178,7 @@ Prepare the following parts:
 
 - Use the included Allen key to clear the hole in the top
 - Twist the Allen key back and forth while it is inserted
-- Use a small amount of force; if the whole is loosened too much, the scroll wheel will jostle in an unpleasant way during regular use
+- Use a small amount of force; if the hole is loosened too much, the scroll wheel will jostle in an unpleasant way during regular use
 - Make sure that the Allen key is inserted all of the way into the hole, so as to clear or crush obstructions
 
 ## Step 26: Put threaded inserts into top