diff --git a/QubesOS-Checklist.md b/QubesOS-Checklist.md
index 854ad4f..aac52b0 100644
--- a/QubesOS-Checklist.md
+++ b/QubesOS-Checklist.md
@@ -8,7 +8,7 @@
 
 For general coding:
 
-    sudo yum install ruby fish vim git mercurial svn gcc gcc-c++ genkey keychain
+    sudo yum install ruby ruby-devel fish vim git mercurial svn gcc gcc-c++ genkey keychain
     sudo chsh user
         /usr/bin/fish