diff --git a/spine-ts/spine-pixi/src/SlotMesh.ts b/spine-ts/spine-pixi/src/SlotMesh.ts
index cafb14981..f62563f45 100644
--- a/spine-ts/spine-pixi/src/SlotMesh.ts
+++ b/spine-ts/spine-pixi/src/SlotMesh.ts
@@ -99,6 +99,7 @@ export class SlotMesh extends Mesh implements ISlotMesh {
 		SlotMesh.auxColor[3] = finalVertices[5];
 
 		this.tint = SlotMesh.auxColor;
+		this.alpha = SlotMesh.auxColor[3];
 		this.blendMode = SpineTexture.toPixiBlending(slotBlendMode);
 
 		if (this.geometry.indexBuffer.data.length !== finalIndices.length) {