diff --git a/docs/voices.md b/docs/voices.md
index 7f0ce926..f689a108 100644
--- a/docs/voices.md
+++ b/docs/voices.md
@@ -59,7 +59,7 @@ without the need to specify a voice.
 
 	name <name>
 
-A mandatory name given to this voice.
+A mandatory name given to this voice. Should be single word.
 
 ### language