diff --git a/common/modules/io.jsm b/common/modules/io.jsm
index 5121d6be..2b4b6485 100644
--- a/common/modules/io.jsm
+++ b/common/modules/io.jsm
@@ -208,7 +208,7 @@ var IO = Module("io", {
                 }
                 catch (e) {
                     dactyl.reportError(e);
-                    let message = _("io.sourcingError", e.echoerr || file.path + ": " + e);
+                    let message = _("io.sourcingError", e.echoerr || (file ? file.path : filename) + ": " + e);
                     if (!params.silent)
                         dactyl.echoerr(message);
                 }