diff --git a/src/vim9script.c b/src/vim9script.c
index e86150a..ed1d6da 100644
--- a/src/vim9script.c
+++ b/src/vim9script.c
@@ -580,7 +580,7 @@
 		semsg(_(e_readonlyvar), name);
 		return FAIL;
 	    }
-	    return check_typval_type(sv->sv_type, value);
+	    return check_typval_type(sv->sv_type, value, 0);
 	}
     }
     iemsg("check_script_var_type(): not found");