diff --git a/rest/handler/tracehandler.go b/rest/handler/tracehandler.go
index 5df49db2e..dd19686aa 100644
--- a/rest/handler/tracehandler.go
+++ b/rest/handler/tracehandler.go
@@ -13,7 +13,7 @@ import (
 )
 
 type (
-	// TraceOption defines the method to customize an traceOptions.
+	// TraceOption defines the method to customize a traceOptions.
 	TraceOption func(options *traceOptions)
 
 	// traceOptions is TraceHandler options.