diff --git a/r.html.markdown b/r.html.markdown
index 93751df5..8896c5b0 100644
--- a/r.html.markdown
+++ b/r.html.markdown
@@ -15,7 +15,8 @@ R is a statistical computing language. It has lots of libraries for uploading an
 # You can't make multi-line comments,
 # but you can stack multiple comments like so.
 
-# in Windows or Mac, hit COMMAND-ENTER to execute a line
+# in Windows you can use CTRL-ENTER to execute a line.
+# on Mac it is COMMAND-ENTER