diff --git a/packages/core/src/2d/sprite/SpriteMask.ts b/packages/core/src/2d/sprite/SpriteMask.ts
index 851a4896e6..c7646265e0 100644
--- a/packages/core/src/2d/sprite/SpriteMask.ts
+++ b/packages/core/src/2d/sprite/SpriteMask.ts
@@ -17,7 +17,7 @@ export class SpriteMask extends Renderer {
   /** @internal */
   static _textureProperty: ShaderProperty = Shader.getPropertyByName("u_maskTexture");
   /** @internal */
-  static _alphaCutoffProperty: ShaderProperty = Shader.getPropertyByName("u_alphaCutoff");
+  static _alphaCutoffProperty: ShaderProperty = Shader.getPropertyByName("u_maskAlphaCutoff");
 
   private static _tempVec3: Vector3 = new Vector3();
 
diff --git a/packages/core/src/shaderlib/extra/sprite-mask.fs.glsl b/packages/core/src/shaderlib/extra/sprite-mask.fs.glsl
index b18244e091..da06791c01 100644
--- a/packages/core/src/shaderlib/extra/sprite-mask.fs.glsl
+++ b/packages/core/src/shaderlib/extra/sprite-mask.fs.glsl
@@ -2,13 +2,13 @@ precision mediump float;
 precision mediump int;
 
 uniform sampler2D u_maskTexture;
-uniform float u_alphaCutoff;
+uniform float u_maskAlphaCutoff;
 varying vec2 v_uv;
 
 void main()
 {
   vec4 color = texture2D(u_maskTexture, v_uv);
-  if (color.a < u_alphaCutoff) {
+  if (color.a < u_maskAlphaCutoff) {
     discard;
   }