diff --git a/source/RobotAPI/libraries/armem_robot_state/common/localization/TransformHelper.cpp b/source/RobotAPI/libraries/armem_robot_state/common/localization/TransformHelper.cpp
index 8e2246c3dd4dc4175c23e0bb01455b380d94e86c..35b4f9668406d586316b00a01b781eabdfd1bcf9 100644
--- a/source/RobotAPI/libraries/armem_robot_state/common/localization/TransformHelper.cpp
+++ b/source/RobotAPI/libraries/armem_robot_state/common/localization/TransformHelper.cpp
@@ -149,7 +149,7 @@ namespace armarx::armem::common::robot_state::localization
             }
             else
             {
-                ARMARX_WARNING << deactivateSpam(60) << "Cannot perform tf lookup '" << parentFrame << " -> " << frame << "'";
+                ARMARX_WARNING << deactivateSpam(60) << "Cannot perform tf lookup '" << parentFrame << "' -> '" << frame << "'.";
             }
         };