diff --git a/nixos/modules/virtualisation/azure-common.nix b/nixos/modules/virtualisation/azure-common.nix
index 03239991b95..8efa177e30d 100644
--- a/nixos/modules/virtualisation/azure-common.nix
+++ b/nixos/modules/virtualisation/azure-common.nix
@@ -15,6 +15,8 @@ with lib;
   boot.loader.grub.version = 2;
   boot.loader.timeout = 0;
 
+  boot.growPartition = true;
+
   # Don't put old configurations in the GRUB menu.  The user has no
   # way to select them anyway.
   boot.loader.grub.configurationLimit = 0;