diff --git a/src/gl/stereo3d/gl_sidebyside3d.h b/src/gl/stereo3d/gl_sidebyside3d.h
index c79c0c4b45..68ce88f6af 100644
--- a/src/gl/stereo3d/gl_sidebyside3d.h
+++ b/src/gl/stereo3d/gl_sidebyside3d.h
@@ -1,6 +1,6 @@
 /*
 ** gl_sidebyside3d.h
-** Color mask based stereoscopic 3D modes for GZDoom
+** Mosaic image stereoscopic 3D modes for GZDoom
 **
 **---------------------------------------------------------------------------
 ** Copyright 2016 Christopher Bruns