diff --git a/data/shaders/bloom.frag b/data/shaders/bloom.frag
index bc63c195c..782ea05c6 100644
--- a/data/shaders/bloom.frag
+++ b/data/shaders/bloom.frag
@@ -12,5 +12,5 @@ void main()
     float luma = getCIEYxy(col).x;
 
     col *= smoothstep(1., 10., luma);
-    FragColor = vec4(col, 1.0);
+    FragColor = max(vec4(col, 1.0), vec4(0.));
 }
diff --git a/data/shaders/bloomblend.frag b/data/shaders/bloomblend.frag
index 503c9dcb9..81f279f4c 100644
--- a/data/shaders/bloomblend.frag
+++ b/data/shaders/bloomblend.frag
@@ -10,5 +10,5 @@ void main()
     vec4 col = .125 * texture(tex_128, uv);
     col += .25 * texture(tex_256, uv);
     col += .5 * texture(tex_512, uv);
-    FragColor = vec4(col.xyz, 1.);
+    FragColor = max(vec4(col.xyz, 1.), vec4(0.));
 }