diff --git a/core/modules/system/system.install b/core/modules/system/system.install
index b8ef546639e742120a1599581843dc2afad0d20b..531871b1cbf17d0a4b68c000eb29a867e75ae70b 100644
--- a/core/modules/system/system.install
+++ b/core/modules/system/system.install
@@ -353,6 +353,7 @@ function system_requirements($phase) {
     'SPL',
     'tokenizer',
     'xml',
+    'zlib',
   ];
   foreach ($required_extensions as $extension) {
     if (!extension_loaded($extension)) {