diff --git a/libs/app/source/app.cpp b/libs/app/source/app.cpp
index 7bc63c1e..1f979e45 100644
--- a/libs/app/source/app.cpp
+++ b/libs/app/source/app.cpp
@@ -68,6 +68,7 @@ namespace psemek::app
 		SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
 		SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 8);
 		SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
+		SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 8);
 
 		if (opts.multisampling == 0)
 		{