diff --git a/lib/hcl/commands.rb b/lib/hcl/commands.rb
index 09e0c6f..5b69d45 100644
--- a/lib/hcl/commands.rb
+++ b/lib/hcl/commands.rb
@@ -94,7 +94,7 @@ def completion command=nil
       command ||= $PROGRAM_NAME.split('/').last
       $stderr.puts \
         "The hcl completion command is deprecated (and slow!), instead use something like:",
-        "> complete -W "`cat #{HCl::App::ALIAS_LIST}`" #{command}"
+        "> complete -W \"`cat #{HCl::App::ALIAS_LIST}`\" #{command}"
       %[complete -W "#{aliases.join ' '}" #{command}]
     end