diff --git a/wp-admin/includes/file.php b/wp-admin/includes/file.php
index 5599a729e2..8aa4273b92 100644
--- a/wp-admin/includes/file.php
+++ b/wp-admin/includes/file.php
@@ -787,7 +787,7 @@ jQuery(function($){
 <input type="hidden" name="locale" value="<?php echo attribute_escape($_POST['locale']) ?>" />
 <?php endif; ?>
 <p class="submit">
-<input id="upgrade" name="upgrade" type="submit" value="<?php _e('Proceed'); ?>" />
+<input id="upgrade" name="upgrade" type="submit" class="button" value="<?php _e('Proceed'); ?>" />
 </p>
 </div>
 </form>
diff --git a/wp-admin/includes/plugin-install.php b/wp-admin/includes/plugin-install.php
index 5503ffe8fc..1921a11d8d 100644
--- a/wp-admin/includes/plugin-install.php
+++ b/wp-admin/includes/plugin-install.php
@@ -136,7 +136,7 @@ function install_dashboard() {
 	<form method="post" enctype="multipart/form-data" action="<?php echo admin_url('plugin-install.php?tab=upload') ?>">
 		<?php wp_nonce_field( 'plugin-upload') ?>
 		<input type="file" name="pluginzip" />
-		<input type="submit" value="<?php _e('Install Now') ?>" />
+		<input type="submit" class="button" value="<?php _e('Install Now') ?>" />
 	</form>
 	
 	<h4><?php _e('Popular tags') ?></h4>