diff --git a/ufl/algorithms/apply_derivatives.py b/ufl/algorithms/apply_derivatives.py
index 848c405f6..c624fb6a5 100644
--- a/ufl/algorithms/apply_derivatives.py
+++ b/ufl/algorithms/apply_derivatives.py
@@ -22,6 +22,7 @@
     ConstantValue,
     ExprList,
     ExprMapping,
+    FacetNormal,
     FloatValue,
     FormArgument,
     Grad,
@@ -657,7 +658,7 @@ def reference_grad(self, o):
         f = o.ufl_operands[0]
 
         valid_operand = f._ufl_is_in_reference_frame_ or isinstance(
-            f, (JacobianInverse, SpatialCoordinate, Jacobian, JacobianDeterminant)
+            f, (JacobianInverse, SpatialCoordinate, Jacobian, JacobianDeterminant, FacetNormal)
         )
         if not valid_operand:
             raise ValueError("ReferenceGrad can only wrap a reference frame type!")