diff --git a/src/common/rendering/hwrenderer/postprocessing/hw_postprocess.cpp b/src/common/rendering/hwrenderer/postprocessing/hw_postprocess.cpp
index 7a31ac4161..219bb9bd64 100644
--- a/src/common/rendering/hwrenderer/postprocessing/hw_postprocess.cpp
+++ b/src/common/rendering/hwrenderer/postprocessing/hw_postprocess.cpp
@@ -894,7 +894,7 @@ void PPShadowMap::Update(PPRenderState* renderstate)
 
 /////////////////////////////////////////////////////////////////////////////
 
-CVAR(Bool, gl_custompost, true, 0)
+CVAR(Bool, gl_custompost, true, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_NOINITCALL)
 
 void PPCustomShaders::Run(PPRenderState *renderstate, FString target)
 {
diff --git a/src/common/textures/hw_material.cpp b/src/common/textures/hw_material.cpp
index 3f149d7289..944e311d1b 100644
--- a/src/common/textures/hw_material.cpp
+++ b/src/common/textures/hw_material.cpp
@@ -30,7 +30,7 @@
 #include "v_video.h"
 
 
-CVAR(Bool, gl_customshader, true, 0);
+CVAR(Bool, gl_customshader, true, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_NOINITCALL);
 
 
 static IHardwareTexture* (*layercallback)(int layer, int translation);