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-rw-r--r--nixos/modules/virtualisation/qemu-vm.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/nixos/modules/virtualisation/qemu-vm.nix b/nixos/modules/virtualisation/qemu-vm.nix
index 6ce4461babc..67fde55faab 100644
--- a/nixos/modules/virtualisation/qemu-vm.nix
+++ b/nixos/modules/virtualisation/qemu-vm.nix
@@ -306,7 +306,7 @@ in
     virtualisation.msize =
       mkOption {
         type = types.ints.positive;
-        default = 16384;
+        default = pkgs.vmTools.default9PMsizeBytes;
         description =
           ''
             The msize (maximum packet size) option passed to 9p file systems, in