diff --git a/spinnman/messages/sdp/sdp_header.py b/spinnman/messages/sdp/sdp_header.py
index 538855a63..4afdb35d1 100644
--- a/spinnman/messages/sdp/sdp_header.py
+++ b/spinnman/messages/sdp/sdp_header.py
@@ -330,7 +330,7 @@ def get_physical_cpu_id(self) -> str:
 
         :rtype: str
         """
-        return SpiNNManDataView.get_physical_core_string(
+        return SpiNNManDataView.get_physical_string(
             (self._destination_chip_x, self._destination_chip_y),
             self._destination_cpu)