diff --git a/renderdoc/data/glsl/quadresolve.frag b/renderdoc/data/glsl/quadresolve.frag
index 7c9fc65d9..e5c10f9b3 100644
--- a/renderdoc/data/glsl/quadresolve.frag
+++ b/renderdoc/data/glsl/quadresolve.frag
@@ -49,9 +49,9 @@ void main()
 {
 	ivec2 quad = ivec2(gl_FragCoord.xy*0.5f);
 
-	uint overdraw = 0;
-	for(uint i = 0; i < 4; i++)
-		overdraw += imageLoad(overdrawImage, ivec3(quad, i)).x/(i + 1);
+	uint overdraw = 0u;
+	for(uint i = 0u; i < 4u; i++)
+		overdraw += imageLoad(overdrawImage, ivec3(quad, i)).x/(i + 1u);
 
 	color_out = ToColour(overdraw);
 }