diff --git a/PhysicsTools/Heppy/python/analyzers/examples/JetAnalyzer.py b/PhysicsTools/Heppy/python/analyzers/examples/JetAnalyzer.py
index 29bd2c695f095..0118db50bc211 100644
--- a/PhysicsTools/Heppy/python/analyzers/examples/JetAnalyzer.py
+++ b/PhysicsTools/Heppy/python/analyzers/examples/JetAnalyzer.py
@@ -8,7 +8,7 @@
 from PhysicsTools.HeppyCore.statistics.counter import Counter, Counters
 from PhysicsTools.HeppyCore.utils.deltar import deltaR2
 
-from PhysicsTools.Heppy.physicsutils.btagsf import BTagSF
+from PhysicsTools.Heppy.physicsutils.btagsf_lowercase import BTagSF
 from PhysicsTools.Heppy.physicsobjects.PhysicsObjects import GenParticle
 from PhysicsTools.Heppy.utils.cmsswRelease import isNewerThan
 
diff --git a/PhysicsTools/Heppy/python/physicsutils/btagsf.py b/PhysicsTools/Heppy/python/physicsutils/btagsf_lowercase.py
similarity index 100%
rename from PhysicsTools/Heppy/python/physicsutils/btagsf.py
rename to PhysicsTools/Heppy/python/physicsutils/btagsf_lowercase.py