diff --git a/fdb/fbcore.py b/fdb/fbcore.py
index 9d8545a..52221d6 100644
--- a/fdb/fbcore.py
+++ b/fdb/fbcore.py
@@ -3564,7 +3564,10 @@ def execute(self, operation, parameters=None):
         if is_dead_proxy(self._ps):
             self._ps = None
         if self._ps != None:
-            self._ps.close()
+            # Dirty trick to check whether operation when it's
+            # PreparedStatement is the one we (may) have weak proxy for
+            if self._ps.__repr__.__self__ is not operation:
+                self._ps.close()
         if not self._transaction.active:
             self._transaction.begin()
         if isinstance(operation, PreparedStatement):
diff --git a/test/testfdb.py b/test/testfdb.py
index f3cafea..898bd04 100644
--- a/test/testfdb.py
+++ b/test/testfdb.py
@@ -686,16 +686,19 @@ def tearDown(self):
     def test_executemany(self):
         cur = self.con.cursor()
         cur.executemany("insert into t values(?)",[(1,),(2,)])
-        cur.executemany("insert into t values(?)",[(3,),(4,)])
+        cur.executemany("insert into t values(?)",[(3,)])
+        cur.executemany("insert into t values(?)",[(4,),(5,),(6,)])
         self.con.commit()
         p = cur.prep("insert into t values(?)")
-        cur.executemany(p,[(5,),(6,)])
         cur.executemany(p,[(7,),(8,)])
+        cur.executemany(p,[(9,)])
+        cur.executemany(p,[(10,),(11,),(12,)])
         self.con.commit()
         cur.execute("select * from T order by c1")
         rows = cur.fetchall()
         self.assertListEqual(rows,[(1,),(2,),(3,),(4,),
-                                   (5,),(6,),(7,),(8,)])
+                                   (5,),(6,),(7,),(8,),
+                                   (9,),(10,),(11,),(12,)])
     def test_iteration(self):
         if self.con.ods < fdb.ODS_FB_30:
             data = [('USA', 'Dollar'), ('England', 'Pound'), ('Canada', 'CdnDlr'),