diff --git a/src/db/db/dbNetlistCrossReference.cc b/src/db/db/dbNetlistCrossReference.cc
index 93f46acea..37598df5c 100644
--- a/src/db/db/dbNetlistCrossReference.cc
+++ b/src/db/db/dbNetlistCrossReference.cc
@@ -27,6 +27,7 @@ namespace db
 {
 
 NetlistCrossReference::NetlistCrossReference ()
+  : mp_per_circuit_data (0)
 {
   //  .. nothing yet ..
 }