diff --git a/gnu/system/vm.scm b/gnu/system/vm.scm
index 3370df1c81..0fc9fb57f4 100644
--- a/gnu/system/vm.scm
+++ b/gnu/system/vm.scm
@@ -245,7 +245,7 @@ (define* (system-qemu-image/shared-store-script os
                                                 (qemu qemu)
                                                 (graphic? #t)
                                                 (volatile? #t)
-                                                (memory-size 2048)
+                                                (memory-size 512)
                                                 (mappings '())
                                                 full-boot?
                                                 (disk-image-size