diff --git a/go/types/api.go b/go/types/api.go
index 025ccfef..7e98d054 100644
--- a/go/types/api.go
+++ b/go/types/api.go
@@ -121,7 +121,7 @@ type Config struct {
 	Import Importer
 
 	// If Sizes != nil, it provides the sizing functions for package unsafe.
-	// Otherwise &StdSize{WordSize: 8, MaxAlign: 8} is used instead.
+	// Otherwise &StdSizes{WordSize: 8, MaxAlign: 8} is used instead.
 	Sizes Sizes
 }