diff --git a/sdc/Sdc.cc b/sdc/Sdc.cc
index 97885604..e8cdbc8b 100644
--- a/sdc/Sdc.cc
+++ b/sdc/Sdc.cc
@@ -275,11 +275,6 @@ Sdc::deleteConstraints()
     delete checks;
   }
 
-  for (auto pin_data_check : data_checks_from_map_) {
-    DataCheckSet *checks = pin_data_check.second;
-    delete checks;
-  }
-
   input_delays_.deleteContents();
   input_delay_pin_map_.deleteContents();
   input_delay_leaf_pin_map_.deleteContents();