diff --git a/wp-admin/includes/misc.php b/wp-admin/includes/misc.php
index 13382754e7..5a3b9706c7 100644
--- a/wp-admin/includes/misc.php
+++ b/wp-admin/includes/misc.php
@@ -296,7 +296,7 @@ function wp_reset_vars( $vars ) {
  */
 function show_message($message) {
 	if ( is_wp_error($message) ){
-		if ( $message->get_error_data() )
+		if ( $message->get_error_data() && is_string( $message->get_error_data() ) )
 			$message = $message->get_error_message() . ': ' . $message->get_error_data();
 		else
 			$message = $message->get_error_message();