diff --git a/cairis/core/TrustBoundary.py b/cairis/core/TrustBoundary.py
index 18bb50875..43807ff3a 100644
--- a/cairis/core/TrustBoundary.py
+++ b/cairis/core/TrustBoundary.py
@@ -28,6 +28,7 @@ def __init__(self,tbId = -1,tbName = '',tbType = 'General', tbDesc = '',comps =
     self.theTags = tags
 
   def id(self): return self.theId
+  def setId(self,anId): self.theId = anId
   def name(self): return self.theName
   def type(self): return self.theType
   def description(self): return self.theDescription
diff --git a/cairis/mio/ModelImport.py b/cairis/mio/ModelImport.py
index 0a1459576..f9ad9f403 100644
--- a/cairis/mio/ModelImport.py
+++ b/cairis/mio/ModelImport.py
@@ -779,7 +779,12 @@ def importTrustBoundaries(tbs,session_id):
   b = Borg()
   db_proxy = b.get_dbproxy(session_id)
   for tb in tbs:
-    db_proxy.addTrustBoundary(tb)
+    objtId = db_proxy.existingObject(tb.name(),'trust_boundary')
+    if objtId == -1:
+      db_proxy.addTrustBoundary(tb)
+    else:
+      tb.setId(objtId)
+      db_proxy.updateTrustBoundary(tb)
   noOfTrustBoundaries = len(tbs)
   msgStr = 'Imported ' +str( noOfTrustBoundaries) + ' trust boundar'
   if (noOfTrustBoundaries != 1):