diff --git a/src/osd/modules/opengl/gl_shader_tool.h b/src/osd/modules/opengl/gl_shader_tool.h
index 28a84143b29..50845bd590f 100644
--- a/src/osd/modules/opengl/gl_shader_tool.h
+++ b/src/osd/modules/opengl/gl_shader_tool.h
@@ -7,7 +7,8 @@
  * Copyright (c) 2007, Sven Gothel
  * Copyright (c) 2007, MAME Team
  *
- * GPL version 2
+ * May be distributed under the terms of the GNU General Public
+ * License, version 2.0, or the 3-Clause BSD License.
  *
  * OpenGL GLSL ARB extensions:
  *