diff --git a/src/wp-admin/network/settings.php b/src/wp-admin/network/settings.php
index 614499f258..fac3659a25 100644
--- a/src/wp-admin/network/settings.php
+++ b/src/wp-admin/network/settings.php
@@ -273,7 +273,7 @@ if ( isset( $_GET['updated'] ) ) {
 			<tr>
 				<th scope="row"><?php _e( 'Site upload space' ) ?></th>
 				<td>
-					<label><input type="checkbox" id="upload_space_check_disabled" name="upload_space_check_disabled" value="0"<?php checked( get_site_option( 'upload_space_check_disabled' ), 0 ) ?>/> <?php printf( __( 'Limit total size of files uploaded to %s MB' ), '</label><label><input name="blog_upload_space" type="number" min="0" style="width: 100px" id="blog_upload_space" aria-describedby="blog-upload-space-desc" value="' . esc_attr( get_site_option('blog_upload_space', 100) ) . '" />' ); ?></label><br />
+					<label><input type="checkbox" id="upload_space_check_disabled" name="upload_space_check_disabled" value="0"<?php checked( (bool) get_site_option( 'upload_space_check_disabled' ), false ) ?>/> <?php printf( __( 'Limit total size of files uploaded to %s MB' ), '</label><label><input name="blog_upload_space" type="number" min="0" style="width: 100px" id="blog_upload_space" aria-describedby="blog-upload-space-desc" value="' . esc_attr( get_site_option('blog_upload_space', 100) ) . '" />' ); ?></label><br />
 					<p class="screen-reader-text" id="blog-upload-space-desc">
 						<?php _e( 'Size in megabytes' ) ?>
 					</p>