diff --git a/encoding/protoavro/encode.go b/encoding/protoavro/encode.go
index 48c4720..3a7f1f7 100644
--- a/encoding/protoavro/encode.go
+++ b/encoding/protoavro/encode.go
@@ -5,8 +5,8 @@ import (
 	"google.golang.org/protobuf/reflect/protoreflect"
 )
 
-// EncodeJSON returns the Avro JSON encoding of message.
-func EncodeJSON(message proto.Message) (interface{}, error) {
+// encodeJSON returns the Avro JSON encoding of message.
+func encodeJSON(message proto.Message) (interface{}, error) {
 	return messageJSON(message.ProtoReflect())
 }
 
diff --git a/encoding/protoavro/encoding_test.go b/encoding/protoavro/encoding_test.go
index 09f748d..74f7e97 100644
--- a/encoding/protoavro/encoding_test.go
+++ b/encoding/protoavro/encoding_test.go
@@ -520,7 +520,7 @@ func Test_JSON(t *testing.T) {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
 			// t.Parallel()
-			got, err := EncodeJSON(tt.msg)
+			got, err := encodeJSON(tt.msg)
 			assert.NilError(t, err)
 			assert.DeepEqual(t, tt.expected, got)
 
diff --git a/encoding/protoavro/marshal.go b/encoding/protoavro/marshal.go
index d2bc686..368681a 100644
--- a/encoding/protoavro/marshal.go
+++ b/encoding/protoavro/marshal.go
@@ -46,7 +46,7 @@ func (m *Marshaler) Marshal(messages ...proto.Message) error {
 		if a != b {
 			return fmt.Errorf("expected message '%s' but got '%s'", a, b)
 		}
-		m, err := EncodeJSON(message)
+		m, err := encodeJSON(message)
 		if err != nil {
 			return fmt.Errorf("encode json: %w", err)
 		}