diff --git a/xs/xsp/GCode.xsp b/xs/xsp/GCode.xsp
index 36b43271c..c1856ccf7 100644
--- a/xs/xsp/GCode.xsp
+++ b/xs/xsp/GCode.xsp
@@ -31,7 +31,7 @@
             try {
                 THIS->do_export(print, path, preview_data);
             } catch (std::exception& e) {
-                croak(e.what());
+                croak("%s\n", e.what());
             }
         %};