diff --git a/CHANGES.md b/CHANGES.md
index 27c6ecba7e16..c89a55ebf07d 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -9,6 +9,9 @@ Unreleased
 - Add `dune show` command group which is an alias of `dune describe`. (#7946,
   @Alizter)
 
+- `enabled_if` now supports `arch_sixtyfour` variable (#8023, fixes 7997,
+  @Alizter)
+
 - Include source tree scans in the traces produced by `--trace-file` (#7937,
   @rgrinberg)
 
diff --git a/src/dune_rules/enabled_if.ml b/src/dune_rules/enabled_if.ml
index dd5d8d85c83f..83270f03ac23 100644
--- a/src/dune_rules/enabled_if.ml
+++ b/src/dune_rules/enabled_if.ml
@@ -18,6 +18,7 @@ let common_vars_list =
   ; "profile"
   ; "ocaml_version"
   ; "context_name"
+  ; "arch_sixtyfour"
   ]
 
 let common_vars ~since =
@@ -26,6 +27,7 @@ let common_vars ~since =
        ~f:(fun var ->
          match var with
          | "context_name" -> (var, (2, 7))
+         | "arch_sixtyfour" -> (var, (3, 9))
          | _ -> (var, since))
        common_vars_list)
 
diff --git a/test/blackbox-tests/test-cases/enabled_if/eif-arch_sixtyfour.t/hello.ml b/test/blackbox-tests/test-cases/enabled_if/eif-arch_sixtyfour.t/hello.ml
new file mode 100644
index 000000000000..0b94899688b6
--- /dev/null
+++ b/test/blackbox-tests/test-cases/enabled_if/eif-arch_sixtyfour.t/hello.ml
@@ -0,0 +1 @@
+let () = Printf.printf "Hello, World!\n"
diff --git a/test/blackbox-tests/test-cases/enabled_if/eif-arch_sixtyfour.t/run.t b/test/blackbox-tests/test-cases/enabled_if/eif-arch_sixtyfour.t/run.t
new file mode 100644
index 000000000000..b2ba6784b88e
--- /dev/null
+++ b/test/blackbox-tests/test-cases/enabled_if/eif-arch_sixtyfour.t/run.t
@@ -0,0 +1,37 @@
+Testing %{arch_sixtyfour} in enabled_if
+
+  $ cat > dune-project << EOF
+  > (lang dune 3.9)
+  > EOF
+
+This will always build
+  $ cat > dune << EOF
+  > (executable
+  >  (name hello)
+  >  (enabled_if (= %{arch_sixtyfour} %{arch_sixtyfour})))
+  > EOF
+
+  $ dune exec -- ./hello.exe
+  Hello, World!
+
+Testing the version guard
+
+  $ cat > dune-project << EOF
+  > (lang dune 3.8)
+  > EOF
+
+The parser does not understand blang expressions with unknown variables and can
+only guard on single variables.
+  $ cat > dune << EOF
+  > (executable
+  >  (name hello)
+  >  (enabled_if %{arch_sixtyfour}))
+  > EOF
+
+  $ dune exec -- ./hello.exe
+  File "dune", line 3, characters 13-30:
+  3 |  (enabled_if %{arch_sixtyfour}))
+                   ^^^^^^^^^^^^^^^^^
+  Error: %{arch_sixtyfour} is only available since version 3.9 of the dune
+  language. Please update your dune-project file to have (lang dune 3.9).
+  [1]