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-rw-r--r--tapset-mark.cxx2
1 files changed, 1 insertions, 1 deletions
diff --git a/tapset-mark.cxx b/tapset-mark.cxx
index 5c5fb0ce..c672dc7a 100644
--- a/tapset-mark.cxx
+++ b/tapset-mark.cxx
@@ -187,7 +187,7 @@ mark_var_expanding_visitor::visit_target_symbol (target_symbol* e)
if (e->addressof)
throw semantic_error("cannot take address of marker variable", e->tok);
- if (e->base_name.substr(0,4) == "$arg")
+ if (startswith(e->base_name, "$arg"))
visit_target_symbol_arg (e);
else if (e->base_name == "$format" || e->base_name == "$name"
|| e->base_name == "$$parms" || e->base_name == "$$vars")