diff --git a/passes/equiv/equiv_simple.cc b/passes/equiv/equiv_simple.cc
index 2c9d82914..59974a1e6 100644
--- a/passes/equiv/equiv_simple.cc
+++ b/passes/equiv/equiv_simple.cc
@@ -339,6 +339,8 @@ struct EquivSimplePass : public Pass {
 		CellTypes ct;
 		ct.setup_internals();
 		ct.setup_stdcells();
+		ct.setup_internals_ff();
+		ct.setup_stdcells_mem();
 
 		for (auto module : design->selected_modules())
 		{