diff --git a/src/OpenFOAM/db/objectRegistry/objectRegistry.C b/src/OpenFOAM/db/objectRegistry/objectRegistry.C
index 55cf75fb0f..cbd841f8ae 100644
--- a/src/OpenFOAM/db/objectRegistry/objectRegistry.C
+++ b/src/OpenFOAM/db/objectRegistry/objectRegistry.C
@@ -50,7 +50,8 @@ Foam::objectRegistry::objectRegistry
             IOobject::NO_READ,
             IOobject::AUTO_WRITE,
             false
-        )
+        ),
+        true    // to flag that this is the top-level regIOobject
     ),
     HashTable<regIOobject*>(nIoObjects),
     time_(t),
diff --git a/src/OpenFOAM/db/regIOobject/regIOobject.C b/src/OpenFOAM/db/regIOobject/regIOobject.C
index abfa55ce8f..a5a5e8e1e3 100644
--- a/src/OpenFOAM/db/regIOobject/regIOobject.C
+++ b/src/OpenFOAM/db/regIOobject/regIOobject.C
@@ -41,13 +41,18 @@ int Foam::regIOobject::fileModificationSkew
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
 // Construct from IOobject
-Foam::regIOobject::regIOobject(const IOobject& io)
+Foam::regIOobject::regIOobject(const IOobject& io, const bool isTime)
 :
     IOobject(io),
     registered_(false),
     ownedByRegistry_(false),
     lastModified_(0),
-    eventNo_(db().getEvent()),
+    eventNo_                // Do not get event for top level Time database
+    (
+        isTime
+      ? 0
+      : db().getEvent()
+    ),
     isPtr_(NULL)
 {
     // Register with objectRegistry if requested
diff --git a/src/OpenFOAM/db/regIOobject/regIOobject.H b/src/OpenFOAM/db/regIOobject/regIOobject.H
index fa70701c71..d2c9a3dcbe 100644
--- a/src/OpenFOAM/db/regIOobject/regIOobject.H
+++ b/src/OpenFOAM/db/regIOobject/regIOobject.H
@@ -99,8 +99,9 @@ public:
 
     // Constructors
 
-        //- Construct from IOobject
-        regIOobject(const IOobject&);
+        //- Construct from IOobject. Optional flag for if IOobject is the
+        //  top level regIOobject.
+        regIOobject(const IOobject&, const bool isTime = false);
 
         //- Construct as copy
         regIOobject(const regIOobject&);