diff --git a/pkg/bidichk/bidichk.go b/pkg/bidichk/bidichk.go
index 2e1e899..f1bf20f 100644
--- a/pkg/bidichk/bidichk.go
+++ b/pkg/bidichk/bidichk.go
@@ -15,7 +15,7 @@ import (
 
 const (
 	doc           = "bidichk detects dangerous unicode character sequences"
-	disallowedDoc = `coma separated list of disallowed runes (full name or short name)
+	disallowedDoc = `comma separated list of disallowed runes (full name or short name)
 
 Supported runes