diff --git a/src/modules/contextualprocess/ContextualProcessJob.cpp b/src/modules/contextualprocess/ContextualProcessJob.cpp
index 71bbd31de..3c51e3333 100644
--- a/src/modules/contextualprocess/ContextualProcessJob.cpp
+++ b/src/modules/contextualprocess/ContextualProcessJob.cpp
@@ -129,6 +129,8 @@ ContextualProcessJob::exec()
             if ( !r )
                 return r;
         }
+        else
+            cWarning() << "ContextualProcess checks for unknown variable" << binding->variable;
     }
     return Calamares::JobResult::ok();
 }