diff --git a/content/guides/anvil/creating_ssh_key_pairs_on_mac.md b/content/guides/anvil/creating_ssh_key_pairs_on_mac.md
index 20d6e21c9b92b3b98c5ace3a161467ee3d7143a4..13632f2b8948d4b9d397ee437020dae036f8687f 100644
--- a/content/guides/anvil/creating_ssh_key_pairs_on_mac.md
+++ b/content/guides/anvil/creating_ssh_key_pairs_on_mac.md
@@ -9,7 +9,7 @@ used, which is located in the _Utilities_ folder under _Applications_.
 {{< figure src="/images/13598866.png" width="598" height="67" >}}
 
 Start _Terminal_ and run the
-command `ssh-keygen -f ~/Desktop/anvil_key`.  This will create two key
+command `ssh-keygen -m PEM -f ~/Desktop/anvil_key`.  This will create two key
 files on your Desktop, one public and one private, which can later be
 moved to whatever location you prefer.
 
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