diff --git a/src/super_context.ml b/src/super_context.ml
index 48d2cfcd..126c3568 100644
--- a/src/super_context.ml
+++ b/src/super_context.ml
@@ -95,7 +95,8 @@ let expand_var_no_root t loc syntax_version var =
       if syntax_version < (1, 0) then
         v
       else
-        Loc.fail loc "Uppercase variables are removed in dune files. Use: %%{%s}"
+        Loc.fail loc "Uppercase variables are removed in dune files.@.\
+                      Hint: Did you mean %%{%s} instead?"
           (String.lowercase var)
     end
 
diff --git a/test/blackbox-tests/test-cases/dune-jbuild-var-case/run.t b/test/blackbox-tests/test-cases/dune-jbuild-var-case/run.t
index 49e77824..cda97388 100644
--- a/test/blackbox-tests/test-cases/dune-jbuild-var-case/run.t
+++ b/test/blackbox-tests/test-cases/dune-jbuild-var-case/run.t
@@ -6,7 +6,8 @@ All builtin variables are lower cased in Dune:
   $ dune runtest --root dune-upper
   Entering directory 'dune-upper'
   File "dune", line 3, characters 41-46:
-  Error: Uppercase variables are removed in dune files. Use: %{make}
+  Error: Uppercase variables are removed in dune files.
+  Hint: Did you mean %{make} instead?
   [1]
 
 jbuild files retain the the old names: