diff --git a/packages/frontend/src/utility/image-effector/fxs/fillSquare.ts b/packages/frontend/src/utility/image-effector/fxs/fillSquare.ts
index ccf47c80cd..55b53830e0 100644
--- a/packages/frontend/src/utility/image-effector/fxs/fillSquare.ts
+++ b/packages/frontend/src/utility/image-effector/fxs/fillSquare.ts
@@ -9,6 +9,10 @@ import { i18n } from '@/i18n.js';
 const shader = `#version 300 es
 precision mediump float;
 
+const float PI = 3.141592653589793;
+const float TWO_PI = 6.283185307179586;
+const float HALF_PI = 1.5707963267948966;
+
 in vec2 in_uv;
 uniform sampler2D in_texture;
 uniform vec2 in_resolution;