diff --git a/internal/graphicsdriver/opengl/gl/procaddr_darwin.go b/internal/graphicsdriver/opengl/gl/procaddr_darwin.go
index 35c5babba..cf88e94d5 100644
--- a/internal/graphicsdriver/opengl/gl/procaddr_darwin.go
+++ b/internal/graphicsdriver/opengl/gl/procaddr_darwin.go
@@ -1,5 +1,16 @@
-// SPDX-License-Identifier: MIT
-// SPDX-FileCopyrightText: 2014 Eric Woroshow
+// Copyright 2022 The Ebitengine Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
 
 package gl
 
diff --git a/internal/graphicsdriver/opengl/gl/procaddr_gl.go b/internal/graphicsdriver/opengl/gl/procaddr_gl.go
index 876c06632..36edc228f 100644
--- a/internal/graphicsdriver/opengl/gl/procaddr_gl.go
+++ b/internal/graphicsdriver/opengl/gl/procaddr_gl.go
@@ -1,5 +1,16 @@
-// SPDX-License-Identifier: MIT
-// SPDX-FileCopyrightText: 2014 Eric Woroshow
+// Copyright 2022 The Ebitengine Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
 
 //go:build !android && !darwin && !js && !nintendosdk && !windows && !opengles
 
diff --git a/internal/graphicsdriver/opengl/gl/procaddr_windows.go b/internal/graphicsdriver/opengl/gl/procaddr_windows.go
index 0fcaddc2d..e0a946d5b 100644
--- a/internal/graphicsdriver/opengl/gl/procaddr_windows.go
+++ b/internal/graphicsdriver/opengl/gl/procaddr_windows.go
@@ -1,5 +1,16 @@
-// SPDX-License-Identifier: MIT
-// SPDX-FileCopyrightText: 2014 Eric Woroshow
+// Copyright 2022 The Ebitengine Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
 
 package gl