diff --git a/Control/AthenaPython/python/Bindings.py b/Control/AthenaPython/python/Bindings.py
index 6672e2c2220045d61955e05b7c92c393e7924285..d33e32d296b76a3559b86dcbad4e220c6f78f150 100644
--- a/Control/AthenaPython/python/Bindings.py
+++ b/Control/AthenaPython/python/Bindings.py
@@ -611,13 +611,6 @@ del %s""" % (n,n,n,n,n)
     del popitem
     ## ------------------------------
 
-    ## try to install ttree access enhancement
-    try:
-        from RootUtils.PyROOTFixes import enable_tree_speedups
-        enable_tree_speedups()
-    except ImportError:
-        pass
-
     ## FIXME: would be nice... but somehow interferes with _py_cache property
 ##     ## allow the use of the pythonized properties interface
 ##     def __getattr__( self, attr ):
diff --git a/PhysicsAnalysis/AthenaROOTAccess/python/transientTree.py b/PhysicsAnalysis/AthenaROOTAccess/python/transientTree.py
index ad0c5fba3cb197d2db32f8302df057c132e87311..605e3308b40917b47b96d81b1d6012bff33391d6 100755
--- a/PhysicsAnalysis/AthenaROOTAccess/python/transientTree.py
+++ b/PhysicsAnalysis/AthenaROOTAccess/python/transientTree.py
@@ -1026,9 +1026,6 @@ if ROOT.gApplication.GetName() != "TRint":
 #reg.AddConverter ("TrigInDetTrackTruthMap_old_cnv")
 
 
-# Enable TTree speedups.
-PyROOTFixes.enable_tree_speedups()
-
 # Enable container conversions.
 import ROOT
 ROOT.TConvertingStreamerInfo.Initialize()