diff --git a/apps/openmw/mwscript/transformationextensions.cpp b/apps/openmw/mwscript/transformationextensions.cpp
index 138326ff04..3860257ad6 100644
--- a/apps/openmw/mwscript/transformationextensions.cpp
+++ b/apps/openmw/mwscript/transformationextensions.cpp
@@ -323,7 +323,7 @@ namespace MWScript
                     }
                     else
                     {
-                        throw std::runtime_error ("unknown cell");
+                        throw std::runtime_error (std::string("unknown cell (") + cellID + ")");
                     }
                 }
         };
@@ -420,7 +420,7 @@ namespace MWScript
                     }
                     else
                     {
-                        throw std::runtime_error ("unknown cell");
+                        throw std::runtime_error ( std::string("unknown cell (") + cellID + ")");
                     }
                 }
         };