diff --git a/src/wp-admin/includes/class-wp-debug-data.php b/src/wp-admin/includes/class-wp-debug-data.php
index 1f3ebf8f0b..c52f0058b3 100644
--- a/src/wp-admin/includes/class-wp-debug-data.php
+++ b/src/wp-admin/includes/class-wp-debug-data.php
@@ -48,12 +48,14 @@ class WP_Debug_Data {
 		$core_updates           = get_core_updates();
 		$core_update_needed     = '';
 
-		foreach ( $core_updates as $core => $update ) {
-			if ( 'upgrade' === $update->response ) {
-				/* translators: %s: Latest WordPress version number. */
-				$core_update_needed = ' ' . sprintf( __( '(Latest version: %s)' ), $update->version );
-			} else {
-				$core_update_needed = '';
+		if ( is_array( $core_updates ) ) {
+			foreach ( $core_updates as $core => $update ) {
+				if ( 'upgrade' === $update->response ) {
+					/* translators: %s: Latest WordPress version number. */
+					$core_update_needed = ' ' . sprintf( __( '(Latest version: %s)' ), $update->version );
+				} else {
+					$core_update_needed = '';
+				}
 			}
 		}