diff --git a/CHANGES.md b/CHANGES.md
index be30318b82fd..3a6f204e164b 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -4,6 +4,8 @@
 - Fix segfault on MacOS when dune was being shutdown while in watch mode.
   (#7312, fixes #6151, @gridbugs, @emillon)
 
+- Pass correct flags when compiling `stdlib.ml`. (#7241, @emillon)
+
 3.7.0.post1 (2023-02-21)
 ------------------------
 
diff --git a/src/dune_rules/compilation_context.ml b/src/dune_rules/compilation_context.ml
index 045a12b83e1b..ea39a0fe8170 100644
--- a/src/dune_rules/compilation_context.ml
+++ b/src/dune_rules/compilation_context.ml
@@ -204,11 +204,16 @@ let create ~super_context ~scope ~expander ~obj_dir ~modules ~flags
   }
 
 let for_alias_module t alias_module =
+  let keep_flags = Modules.is_stdlib_alias (modules t) alias_module in
   let flags =
-    let project = Scope.project t.scope in
-    let dune_version = Dune_project.dune_version project in
-    let profile = (Super_context.context t.super_context).profile in
-    Ocaml_flags.default ~dune_version ~profile
+    if keep_flags then
+      (* in the case of stdlib, these flags can be written by the user *)
+      t.flags
+    else
+      let project = Scope.project t.scope in
+      let dune_version = Dune_project.dune_version project in
+      let profile = (Super_context.context t.super_context).profile in
+      Ocaml_flags.default ~dune_version ~profile
   in
   let sandbox =
     let ctx = Super_context.context t.super_context in
diff --git a/test/blackbox-tests/test-cases/stdlib-flags.t b/test/blackbox-tests/test-cases/stdlib-flags.t
new file mode 100644
index 000000000000..68a39ac8b614
--- /dev/null
+++ b/test/blackbox-tests/test-cases/stdlib-flags.t
@@ -0,0 +1,18 @@
+  $ cat > dune-project << EOF
+  > (lang dune 3.7)
+  > (using experimental_building_ocaml_compiler_with_dune 0.1)
+  > EOF
+
+  $ cat > dune << EOF
+  > (library
+  >  (name mystdlib)
+  >  (stdlib)
+  >  (flags :standard -w -8))
+  > EOF
+
+  $ cat > mystdlib.ml << EOF
+  > (* This triggers warning 8 *)
+  > let None = None
+  > EOF
+
+  $ dune build