diff --git a/firedrake/adjoint_utils/blocks/function.py b/firedrake/adjoint_utils/blocks/function.py
index e31a0c4567..dcb02da108 100644
--- a/firedrake/adjoint_utils/blocks/function.py
+++ b/firedrake/adjoint_utils/blocks/function.py
@@ -242,11 +242,13 @@ def evaluate_adj_component(self, inputs, adj_inputs, block_variable, idx,
         else:
             return adj_inputs[0]
 
-    def evaluate_tlm(self):
+    def evaluate_tlm(self, markings=False):
         tlm_input = self.get_dependencies()[0].tlm_value
         if tlm_input is None:
             return
         output = self.get_outputs()[0]
+        if markings and not output.marked_in_path:
+            return
         fs = output.output.function_space()
         f = type(output.output)(fs)
         output.add_tlm_output(