diff --git a/source/RobotAPI/libraries/PriorKnowledge/util/CommonPlaceLoader/CommonPlaceLoader.cpp b/source/RobotAPI/libraries/PriorKnowledge/util/CommonPlaceLoader/CommonPlaceLoader.cpp
index f8c05ffe2e56883568f00621c8661a7a631d722f..0329e3ba290bb0680b54a80272199fac52bacada 100644
--- a/source/RobotAPI/libraries/PriorKnowledge/util/CommonPlaceLoader/CommonPlaceLoader.cpp
+++ b/source/RobotAPI/libraries/PriorKnowledge/util/CommonPlaceLoader/CommonPlaceLoader.cpp
@@ -12,8 +12,7 @@ namespace armarx::priorknowledge::util
         std::vector<CommonPlace> ret;
         if (not js.contains("common_places"))
         {
-            ARMARX_WARNING << "The common_places file has the wrong structure. Missing key "
-                              "'common_places'.";
+            ARMARX_WARNING << "The common_places file (" << source << ") has the wrong structure. Missing key 'common_places'.";
             return ret;
         }