diff --git a/proto/lib.go b/proto/lib.go
index 5d5e345..61f1f22 100644
--- a/proto/lib.go
+++ b/proto/lib.go
@@ -404,9 +404,7 @@
 // names to its int values, and a byte buffer containing the JSON-encoded
 // value, it returns an int32 that can be cast to the enum type by the caller.
 //
-// The function can deal with older JSON representations, which represented
-// enums directly by their int32 values, or with newer representations, which
-// use the symbolic name as a string.
+// The function can deal with both JSON representations, numeric and symbolic.
 func UnmarshalJSONEnum(m map[string]int32, data []byte, enumName string) (int32, error) {
 	if data[0] == '"' {
 		// New style: enums are strings.