diff --git a/wp-admin/ms-edit.php b/wp-admin/ms-edit.php
index 09f9d4bd4..14b23445c 100644
--- a/wp-admin/ms-edit.php
+++ b/wp-admin/ms-edit.php
@@ -442,6 +442,7 @@ switch ( $_GET['action'] ) {
     	if ( is_array( $_POST['theme'] ) ) {
 			$themes = get_themes();
 			reset( $themes );
+			$allowed_themes = array();
 			foreach ( (array) $themes as $key => $theme ) {
 				if ( $_POST['theme'][ esc_html( $theme['Stylesheet'] ) ] == 'enabled' )
 					$allowed_themes[ esc_html( $theme['Stylesheet'] ) ] = true;
diff --git a/wp-admin/ms-themes.php b/wp-admin/ms-themes.php
index 7e69e9082..e6fd9b57b 100644
--- a/wp-admin/ms-themes.php
+++ b/wp-admin/ms-themes.php
@@ -70,7 +70,7 @@ $allowed_themes = get_site_allowed_themes();
 					$disabled = true;
 				}
 				?>
-				<tr valign="top" class="<?php echo $class, $class1; ?>">
+				<tr valign="top" class="<?php echo $class . ' ' . $class1; ?>">
 					<td>
 						<label><input name="theme[<?php echo $theme_key ?>]" type="radio" id="enabled_<?php echo $theme_key ?>" value="enabled" <?php checked( $enabled ) ?> /> <?php _e( 'Yes' ) ?></label>
 						&nbsp;&nbsp;&nbsp;