diff --git a/indra/newview/app_settings/shaders/class1/deferred/rlvF.glsl b/indra/newview/app_settings/shaders/class1/deferred/rlvF.glsl
index d4aec3be7a..20ac01735b 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/rlvF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/rlvF.glsl
@@ -130,7 +130,7 @@ void main()
 			break;
 		case 2:		// Blur (variable)
 			fragColor = texture(diffuseRect, fragTC).rgb;
-			fragColor = mix(fragColor, blurVariable(diffuseRect, fragTC, SPHERE_PARAMS.x, BLUR_DIRECTION, effectStrength), int(effectStrength > 0));
+			fragColor = mix(fragColor, blurVariable(diffuseRect, fragTC, SPHERE_PARAMS.x, BLUR_DIRECTION, effectStrength), bvec3(effectStrength > 0));
 			break;
 		case 3:		// ChromaticAberration
 			fragColor = chromaticAberration(diffuseRect, fragTC, SPHERE_PARAMS.xy, SPHERE_PARAMS.zw, effectStrength);