diff --git a/library/source_control/bzr b/library/source_control/bzr
index a5bb396c5a..bda9bd311f 100644
--- a/library/source_control/bzr
+++ b/library/source_control/bzr
@@ -46,7 +46,7 @@ options:
     force:
         required: false
         default: "yes"
-        choices: [ yes, no ]
+        choices: [ 'yes', 'no' ]
         description:
             - If C(yes), any modified files in the working
               tree will be discarded.