diff --git a/pykd/dbgext.cpp b/pykd/dbgext.cpp
index 6ee2ab6..e44c759 100644
--- a/pykd/dbgext.cpp
+++ b/pykd/dbgext.cpp
@@ -261,6 +261,48 @@ SetupDebugEngine( IDebugClient4 *client, DbgExt *dbgExt  )
     client->QueryInterface( __uuidof(IDebugSystemObjects2), (void**)&dbgExt->system2 );
 }
 
+DbgExt::~DbgExt()
+{
+    if ( client )
+        client->Release();
+        
+    if ( client4 )
+        client4->Release();
+        
+    if ( control )
+        control->Release();
+        
+    if ( control4 )
+        control4->Release();
+        
+    if ( registers )
+        registers->Release();
+            
+    if ( symbols )
+        symbols->Release();
+        
+    if ( symbols2 )
+        symbols2->Release();
+        
+    if ( symbols3 )
+        symbols3->Release();
+        
+    if ( dataSpaces )
+        dataSpaces->Release();
+        
+    if ( dataSpaces4 )
+        dataSpaces4->Release();
+        
+    if ( advanced2 )
+        advanced2->Release();
+        
+    if ( system )
+        system->Release();
+        
+    if ( system2 )
+        system2->Release();
+}
+
 /////////////////////////////////////////////////////////////////////////////////    
     
 HRESULT 
@@ -273,7 +315,7 @@ py( PDEBUG_CLIENT4 client, PCSTR args)
 
     try {
     
-        DbgExt      ext = { 0 };
+        DbgExt      ext;
         SetupDebugEngine( client, &ext );
         dbgExt = &ext;
 
@@ -389,8 +431,7 @@ pycmd( PDEBUG_CLIENT4 client, PCSTR args )
 {
     try {
 
-
-        DbgExt      ext = { 0 };
+        DbgExt      ext;
 
         SetupDebugEngine( client, &ext );
         dbgExt = &ext;
@@ -491,7 +532,7 @@ HRESULT
 CALLBACK
 pythonpath( PDEBUG_CLIENT4 client, PCSTR args )
 {
-    DbgExt      ext = { 0 };
+    DbgExt      ext;
 
     SetupDebugEngine( client, &ext );  
     dbgExt = &ext;
diff --git a/pykd/dbgext.h b/pykd/dbgext.h
index 7553491..d3c3e84 100644
--- a/pykd/dbgext.h
+++ b/pykd/dbgext.h
@@ -24,6 +24,24 @@ struct DbgExt {
     
     IDebugSystemObjects     *system;
     IDebugSystemObjects2    *system2;
+    
+    DbgExt() :
+        client( NULL ),
+        client4( NULL ),
+        control( NULL ),
+        control4( NULL ),
+        registers( NULL ),
+        symbols( NULL ),
+        symbols2( NULL ),
+        symbols3( NULL ),
+        dataSpaces( NULL ),
+        dataSpaces4( NULL ),
+        advanced2( NULL ),
+        system( NULL ),
+        system2( NULL )
+        {}
+            
+    ~DbgExt();
 };
 
 extern DbgExt    *dbgExt;
diff --git a/pykd/dbgsession.cpp b/pykd/dbgsession.cpp
index 93fab2c..888ae4f 100644
--- a/pykd/dbgsession.cpp
+++ b/pykd/dbgsession.cpp
@@ -4,7 +4,7 @@
 #include "dbgeventcb.h"
 #include "dbgsession.h"
 
-DbgExt      dbgGlobalSession = { 0 };
+DbgExt      dbgGlobalSession;
 
 bool        dbgSessionStarted = false;