diff --git a/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/utils/TwoColorPolygonBatch.java b/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/utils/TwoColorPolygonBatch.java
index f05a93b5f..bdea26bac 100644
--- a/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/utils/TwoColorPolygonBatch.java
+++ b/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/utils/TwoColorPolygonBatch.java
@@ -69,7 +69,7 @@ public class TwoColorPolygonBatch {
 		mesh = new Mesh(vertexDataType, false, maxVertices, maxTriangles * 3, //
 			new VertexAttribute(Usage.Position, 2, "a_position"), //
 			new VertexAttribute(Usage.ColorPacked, 4, "a_light"), //
-			new VertexAttribute(Usage.ColorPacked, 3, "a_dark"), //
+			new VertexAttribute(Usage.ColorPacked, 4, "a_dark"), //
 			new VertexAttribute(Usage.TextureCoordinates, 2, "a_texCoord0"));
 
 		vertices = new float[maxVertices * 6];