diff --git a/postgresql-libpq.cabal b/postgresql-libpq.cabal
--- a/postgresql-libpq.cabal
+++ b/postgresql-libpq.cabal
@@ -1,5 +1,5 @@
 Name:                postgresql-libpq
-Version:             0.9.2.0
+Version:             0.9.3.0
 Synopsis:            low-level binding to libpq
 
 Description:         This is a binding to libpq: the C application
@@ -54,4 +54,4 @@
 source-repository this
   type:     git
   location: http://github.com/lpsmith/postgresql-libpq
-  tag:      v0.9.2.0
+  tag:      v0.9.3.0
diff --git a/src/Database/PostgreSQL/LibPQ.hsc b/src/Database/PostgreSQL/LibPQ.hsc
--- a/src/Database/PostgreSQL/LibPQ.hsc
+++ b/src/Database/PostgreSQL/LibPQ.hsc
@@ -961,6 +961,7 @@
                                 -- transfer started.
                 | CopyIn        -- ^ Copy In (to server) data transfer
                                 -- started.
+                | CopyBoth      -- ^ Copy In/Out data transfer started.
                 | BadResponse   -- ^ The server's response was not understood.
                 | NonfatalError -- ^ A nonfatal error (a notice or
                                 -- warning) occurred.
@@ -977,6 +978,7 @@
     toEnum (#const PGRES_TUPLES_OK)      = TuplesOk
     toEnum (#const PGRES_COPY_OUT)       = CopyOut
     toEnum (#const PGRES_COPY_IN)        = CopyIn
+    toEnum (#const PGRES_COPY_BOTH)      = CopyBoth
     toEnum (#const PGRES_BAD_RESPONSE)   = BadResponse
     toEnum (#const PGRES_NONFATAL_ERROR) = NonfatalError
     toEnum (#const PGRES_FATAL_ERROR)    = FatalError
@@ -988,6 +990,7 @@
     fromEnum TuplesOk      = (#const PGRES_TUPLES_OK)
     fromEnum CopyOut       = (#const PGRES_COPY_OUT)
     fromEnum CopyIn        = (#const PGRES_COPY_IN)
+    fromEnum CopyBoth      = (#const PGRES_COPY_BOTH)
     fromEnum BadResponse   = (#const PGRES_BAD_RESPONSE)
     fromEnum NonfatalError = (#const PGRES_NONFATAL_ERROR)
     fromEnum FatalError    = (#const PGRES_FATAL_ERROR)
@@ -2113,10 +2116,13 @@
 --   later call 'disableNoticeReporting' after calling this function.
 enableNoticeReporting :: Connection -> IO ()
 enableNoticeReporting conn@(Conn _ nbRef) = do
-    nb' <- c_malloc_noticebuffer
-    _ <- withConn conn $ \c -> c_PQsetNoticeReceiver c p_store_notices nb'
-    nb  <- swapMVar nbRef nb'
-    c_free_noticebuffer nb
+  if isNullConnection conn
+    then return ()
+    else do
+      nb' <- c_malloc_noticebuffer
+      _ <- withConn conn $ \c -> c_PQsetNoticeReceiver c p_store_notices nb'
+      nb  <- swapMVar nbRef nb'
+      c_free_noticebuffer nb
 
 -- |  This function retrieves any notices received from the backend.
 --    Because multiple notices can be received at a time,  you will