diff --git a/src/systemc/tlm_bridge/gem5_to_tlm.cc b/src/systemc/tlm_bridge/gem5_to_tlm.cc
index 6f17a8b..07e4821 100644
--- a/src/systemc/tlm_bridge/gem5_to_tlm.cc
+++ b/src/systemc/tlm_bridge/gem5_to_tlm.cc
@@ -112,7 +112,8 @@
  * gem5 packet to tlm payload. This can be useful when there exists a SystemC
  * extension that requires information in gem5 packet. For example, if a user
  * defined a SystemC extension the carries stream_id, the user may add a step
- * here to read stream_id out and set the extension properly.
+ * here to read stream_id out and set the extension properly. Steps should be
+ * idempotent.
  */
 void
 addPacketToPayloadConversionStep(PacketToPayloadConversionStep step)
@@ -140,6 +141,10 @@
         trans = &tlmSenderState->trans;
         trans->set_address(packet->getAddr());
         trans->acquire();
+        // Apply all conversion steps necessary in this specific setup.
+        for (auto &step : extraPacketToPayloadSteps) {
+            step(packet, *trans);
+        }
         return trans;
     }
 
diff --git a/src/systemc/tlm_bridge/tlm_to_gem5.cc b/src/systemc/tlm_bridge/tlm_to_gem5.cc
index 84907be..25da42b 100644
--- a/src/systemc/tlm_bridge/tlm_to_gem5.cc
+++ b/src/systemc/tlm_bridge/tlm_to_gem5.cc
@@ -89,7 +89,8 @@
  * tlm payload to gem5 packet. This can be useful when there exists a SystemC
  * extension that carries extra information. For example, SystemC user might
  * define an extension to store stream_id, the user may then add an extra step
- * to set the generated request's stream_id accordingly.
+ * to set the generated request's stream_id accordingly. Steps should be
+ * idempotent.
  */
 void
 addPayloadToPacketConversionStep(PayloadToPacketConversionStep step)
@@ -117,6 +118,10 @@
         auto pkt = extension->getPacket();
         // Sync the address which could have changed.
         pkt->setAddr(trans.get_address());
+        // Apply all conversion steps necessary in this specific setup.
+        for (auto &step : extraPayloadToPacketSteps) {
+            step(pkt, trans);
+        }
         return std::make_pair(pkt, false);
     }