diff --git a/src/backend/gl/shaders.c b/src/backend/gl/shaders.c
index 90f636b7..96e385b1 100644
--- a/src/backend/gl/shaders.c
+++ b/src/backend/gl/shaders.c
@@ -202,7 +202,8 @@ const char dither_glsl[] = GLSL(330,
 	}
 	vec4 dither(vec4 c, vec2 coord) {
 		vec4 residual = mod(c, 1.0 / 255.0);
-		vec4 dithered = vec4(greaterThan(residual, vec4(1e-4)));
+		residual = min(residual, vec4(1.0 / 255.0) - residual);
+		vec4 dithered = vec4(greaterThan(residual, vec4(1.0 / 65535.0)));
 		return vec4(c + dithered * bayer(coord) / 255.0);
 	}
 );