diff --git a/src/cmd/cmdsdformat.rb.in b/src/cmd/cmdsdformat.rb.in
index 292b94911..3297e3690 100644
--- a/src/cmd/cmdsdformat.rb.in
+++ b/src/cmd/cmdsdformat.rb.in
@@ -19,7 +19,7 @@ require 'pathname'
 # Constants.
 LIBRARY_VERSION = '@PROJECT_VERSION_FULL@'
 COMMANDS = {
-  'sdf' => '@library_location@'
+  "sdf" => "@library_location@",
 }
 
 #