diff --git a/README.md b/README.md
index 907a310..7b938b5 100644
--- a/README.md
+++ b/README.md
@@ -29,6 +29,6 @@ To play .btc files in your own Apple II program:
 
 * Replace the [visual feedback](https://github.com/oliverschmidt/Play-BTc/blob/master/play-btc.s#L275) with two `nop` operations.
 
-* Call the BTc player core with
+* Call the BTc player core with:
   * `A` set to the high byte of the memory address you placed the .btc file content on
   * `X` set to the number of samples divided by 256