diff --git a/README.md b/README.md
index 4b3e5c0..21dffe2 100644
--- a/README.md
+++ b/README.md
@@ -271,7 +271,7 @@ int main()
        shader.use();
    
        // ========== Draw triangle ==========
-       vao.drawElement(GL_TRIANGLES, mesh::P_TRIANGLE_INDICE_LEN, GL_UNSIGNED_INT, 0);
+       vao.drawElement(GL_TRIANGLES, sizeof(P_TRIANGLE_INDICE), GL_UNSIGNED_INT, 0);
    
        // ========== Poll events and swap buffers ==========
        glfwPollEvents();