diff --git a/nixos/modules/profiles/hardened.nix b/nixos/modules/profiles/hardened.nix
index 35743d83134b..49cd3504aa0f 100644
--- a/nixos/modules/profiles/hardened.nix
+++ b/nixos/modules/profiles/hardened.nix
@@ -37,9 +37,6 @@ with lib;
     # Slab/slub sanity checks, redzoning, and poisoning
     "slub_debug=FZP"
 
-    # Disable slab merging to make certain heap overflow attacks harder
-    "slab_nomerge"
-
     # Overwrite free'd memory
     "page_poison=1"