diff --git a/search/Sta.cc b/search/Sta.cc
index 0f7184fb..1c845b64 100644
--- a/search/Sta.cc
+++ b/search/Sta.cc
@@ -514,6 +514,7 @@ Sta::~Sta()
   delete report_;
   delete power_;
   delete equiv_cells_;
+  delete dispatch_queue_;
 }
 
 void
diff --git a/search/StaState.cc b/search/StaState.cc
index 8b6e42de..9b4af6f9 100644
--- a/search/StaState.cc
+++ b/search/StaState.cc
@@ -38,7 +38,7 @@ StaState::StaState() :
   search_(nullptr),
   latches_(nullptr),
   thread_count_(1),
-  dispatch_queue_(new DispatchQueue(thread_count_)),
+  dispatch_queue_(nullptr),
   pocv_enabled_(false),
   sigma_factor_(1.0)
 {