diff --git a/libs/ui/source/default_fonts.cpp b/libs/ui/source/default_fonts.cpp
index 1cea2568..7cf9aa70 100644
--- a/libs/ui/source/default_fonts.cpp
+++ b/libs/ui/source/default_fonts.cpp
@@ -18,6 +18,9 @@ namespace psemek::ui
 		gfx::texture_2d atlas = gfx::texture_2d::from_pixmap(gfx::read_pbm(is));
 		atlas.nearest_filter();
 		atlas.clamp();
+		gl::TexParameteri(atlas.target, gl::TEXTURE_SWIZZLE_G, gl::RED);
+		gl::TexParameteri(atlas.target, gl::TEXTURE_SWIZZLE_B, gl::RED);
+		gl::TexParameteri(atlas.target, gl::TEXTURE_SWIZZLE_A, gl::RED);
 
 		std::vector<geom::box<float, 2>> texcoords(range.end - range.begin);