diff --git a/decoysnail.nix b/decoysnail.nix
index c608f17..3d368cd 100644
--- a/decoysnail.nix
+++ b/decoysnail.nix
@@ -9,6 +9,11 @@
       ./fstrim.nix
     ];
 
+  environment.etc."lvm/lvm.conf".text = ''
+    devices {
+      issue_discards = 1
+    }
+  '';
   boot.initrd.luks.devices = [
     {
       name = "sda2_crypt";
@@ -19,6 +24,7 @@
       name = "sdb2_crypt";
       device = "/dev/disk/by-uuid/d3485d00-8399-40cc-8bce-80b9bd24e63a";
       preLVM = true;
+      allowDiscards = true;
     }
   ];