diff --git a/src/objects/InstancedMesh.js b/src/objects/InstancedMesh.js
index d5dce2fca07a50a500e48bf30c405f33da079220..1ccf4a14a90231a8309308dafa0a8058c493f708 100644
--- a/src/objects/InstancedMesh.js
+++ b/src/objects/InstancedMesh.js
@@ -95,7 +95,7 @@ class InstancedMesh extends Mesh {
 
 		if ( this.instanceColor === null ) {
 
-			this.instanceColor = new BufferAttribute( new Float32Array( this.count * 3 ), 3 );
+			this.instanceColor = new BufferAttribute( new Float32Array( this.instanceMatrix.count * 3 ), 3 );
 
 		}