how to make homepage point to 'Home' menu item

I have created a home.php that displays all posts. What I wish is that when I click on the ‘Home’ menu item, it will return to this homepage. However, it does not and instead, go to another Home page. Please help me with the code. I post here excerpt of the wp_nav_menu code.

<?php
              $main_menu = array(
				 'theme_location' => 'header-menu',
				 'container' => ' ',
				 'container_class' => 'nav',
				 'container_id' => 'header-menu',
				 'echo' => false,
				 'fallback_cb' => ' ',
				 'items_wrap' => '<ul id=\"%1$s\" class=\"%2$s\">%3$s</ul>',
				 'depth' => 0,
				 ); ?>
			  <?php if (is_home( ))?>: <a href="<?php echo home_url( );?>"></a>
              <?php wp_nav_menu( $main_menu ); ?>