diff --git a/res/gamedata/shaders/gl/dumb.ps b/res/gamedata/shaders/gl/dumb.ps
index b41cbf8b8bc..0a0bd265be7 100644
Binary files a/res/gamedata/shaders/gl/dumb.ps and b/res/gamedata/shaders/gl/dumb.ps differ
diff --git a/res/gamedata/shaders/gl/dumb.vs b/res/gamedata/shaders/gl/dumb.vs
index 4595af1b41f..eddb3d9bb87 100644
--- a/res/gamedata/shaders/gl/dumb.vs
+++ b/res/gamedata/shaders/gl/dumb.vs
@@ -3,7 +3,7 @@
 
 //////////////////////////////////////////////////////////////////////////////////////////
 // Vertex
-v2p_dumb main ( v_dumb I )
+v2p_dumb _main ( v_dumb I )
 {
 	v2p_dumb O;