diff --git a/pyadjoint/reduced_functional.py b/pyadjoint/reduced_functional.py
index cd8bcbe1..993615df 100644
--- a/pyadjoint/reduced_functional.py
+++ b/pyadjoint/reduced_functional.py
@@ -1,7 +1,7 @@
 from .drivers import compute_gradient, compute_hessian
 from .enlisting import Enlist
 from .tape import get_working_tape, stop_annotating, no_annotations
-from .overloaded_type import OverloadedType
+from .overloaded_type import OverloadedType, create_overloaded_object
 
 
 def _get_extract_derivative_components(derivative_components):
@@ -123,7 +123,9 @@ def derivative(self, adj_input=1.0, options={}):
 
         # Scale adjoint input
         with stop_annotating():
-            adj_value = self.scale * adj_input
+            # Make sure `adj_input` is an OverloadedType
+            adj_input = create_overloaded_object(adj_input)
+            adj_value = adj_input._ad_mul(self.scale)
 
         derivatives = compute_gradient(self.functional,
                                        controls,