diff --git a/rmw_cyclonedds_cpp/src/rmw_node.cpp b/rmw_cyclonedds_cpp/src/rmw_node.cpp
index 65e3ae4d..3eb9b090 100644
--- a/rmw_cyclonedds_cpp/src/rmw_node.cpp
+++ b/rmw_cyclonedds_cpp/src/rmw_node.cpp
@@ -1698,7 +1698,7 @@ extern "C" rmw_node_t * rmw_create_node(
     return nullptr;
   }
   if (RMW_NAMESPACE_VALID != validation_result) {
-    const char * reason = rmw_node_name_validation_result_string(validation_result);
+    const char * reason = rmw_namespace_validation_result_string(validation_result);
     RMW_SET_ERROR_MSG_WITH_FORMAT_STRING("invalid node namespace: %s", reason);
     return nullptr;
   }