diff --git a/config/ext.json b/config/ext.json
index 14eabf17..87097c4b 100644
--- a/config/ext.json
+++ b/config/ext.json
@@ -694,7 +694,8 @@
         "arg-type": "custom",
         "ext-suggests": [
             "session",
-            "igbinary"
+            "igbinary",
+            "msgpack"
         ],
         "lib-suggests-unix": [
             "zstd",