diff --git a/moretests/should_fail/misc/wrongmap.lus b/moretests/should_fail/misc/wrongmap.lus
new file mode 100644
index 0000000000000000000000000000000000000000..c4dc3c2941d1bba5e34627ad9cb4c03f4347b945
--- /dev/null
+++ b/moretests/should_fail/misc/wrongmap.lus
@@ -0,0 +1,6 @@
+
+
+node overplus = map<<+,4>>;
+
+node do_bool(x,y: bool^4) returns (o: bool^4);
+let o = overplus(x,y); tel