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-rw-r--r--backends/blif/blif.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/backends/blif/blif.cc b/backends/blif/blif.cc
index ecde8b5a..5daab669 100644
--- a/backends/blif/blif.cc
+++ b/backends/blif/blif.cc
@@ -363,7 +363,7 @@ struct BlifBackend : public Backend {
if (top_module_name.empty())
for (auto & mod_it:design->modules_)
if (mod_it.second->get_bool_attribute("\\top"))
- top_module_name = mod_it.first;
+ top_module_name = mod_it.first.str();
fprintf(f, "# Generated by %s\n", yosys_version_str);