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-rw-r--r--passes/hierarchy/submod.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/passes/hierarchy/submod.cc b/passes/hierarchy/submod.cc
index 84c6b916..d0c9f4b5 100644
--- a/passes/hierarchy/submod.cc
+++ b/passes/hierarchy/submod.cc
@@ -105,7 +105,7 @@ struct SubmodWorker
RTLIL::Module *new_mod = new RTLIL::Module;
new_mod->name = submod.full_name;
- design->modules_[new_mod->name] = new_mod;
+ design->add(new_mod);
int port_counter = 1, auto_name_counter = 1;
std::set<std::string> all_wire_names;