diff --git a/passes/opt/opt_clean.cc b/passes/opt/opt_clean.cc
index b22dfad3a..d824fd2db 100644
--- a/passes/opt/opt_clean.cc
+++ b/passes/opt/opt_clean.cc
@@ -103,7 +103,7 @@ struct keep_cache_t
 
 keep_cache_t keep_cache;
 static constexpr auto ct_reg = StaticCellTypes::Categories::join(
-	StaticCellTypes::Compat::internals_mem_ff,
+	StaticCellTypes::Compat::mem_ff,
 	StaticCellTypes::categories.is_anyinit);
 NewCellTypes ct_all;
 int count_rm_cells, count_rm_wires;