diff --git a/README.md b/README.md
index a0896ab..20eea7d 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ The simulator works fine with modern mobile browsers, except that it is a bit ch
 
 ## A Quick Tutorial
 
-With the Altair 8800 simulator, How to input and run the following program to calculate 1 + 2 = 3:
+With a running Altair 8800 simulator, how to input and run the following program to calculate 1 + 2 = 3:
 
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