diff --git a/DDG4/python/checkGeometry.py b/DDG4/python/checkGeometry.py
index 21071fddf2e51536d29ddc230bee7bce312aee1f..c296c012d8bbe41b3259ed81bf21bd348d060d1c 100755
--- a/DDG4/python/checkGeometry.py
+++ b/DDG4/python/checkGeometry.py
@@ -64,14 +64,14 @@ except ImportError,X:
   sys.exit(errno.ENOENT)
 
 try:
-  import DD4hep
+  import dd4hep
 except ImportError,X:
   logging.error('dd4hep python interface not accessible: %s',str(X))
   sys.exit(errno.ENOENT)
 
-DD4hep.setPrintLevel(DD4hep.OutputLevel.ERROR)
+dd4hep.setPrintLevel(dd4hep.OutputLevel.ERROR)
 logging.info('+++%s\n+++ Loading compact geometry:%s\n+++%s',120*'=',opts.compact,120*'=')
-description = DD4hep.Detector.getInstance()
+description = dd4hep.Detector.getInstance()
 description.fromXML(opts.compact)
 opts.num_tracks = int(opts.num_tracks)
 opts.vx = float(opts.vx)
diff --git a/DDG4/python/checkOverlaps.py b/DDG4/python/checkOverlaps.py
index bc366ef24f067dc86e6321de7390b858e78a433b..a6a745839d0221dbe879ae1a9480655f13779fa1 100755
--- a/DDG4/python/checkOverlaps.py
+++ b/DDG4/python/checkOverlaps.py
@@ -49,7 +49,7 @@ except ImportError,X:
   sys.exit(errno.ENOENT)
 
 try:
-  import DD4hep
+  import dd4hep
 except ImportError,X:
   logging.error('dd4hep python interface not accessible: %s',str(X))
   logging.error("%s",parser.format_help())
@@ -57,9 +57,9 @@ except ImportError,X:
 #
 #
 opts.tolerance = float(opts.tolerance)
-DD4hep.setPrintLevel(DD4hep.OutputLevel.ERROR)
+dd4hep.setPrintLevel(dd4hep.OutputLevel.ERROR)
 logging.info('+++%s\n+++ Loading compact geometry:%s\n+++%s',120*'=',opts.compact,120*'=')
-description = DD4hep.Detector.getInstance()
+description = dd4hep.Detector.getInstance()
 description.fromXML(opts.compact)
 logging.info('+++%s\n+++ Checking overlaps of geometry:%s tolerance:%f option:%s\n+++%s',120*'=',opts.compact,opts.tolerance,opts.option,120*'=')
 description.manager().CheckOverlaps(opts.tolerance,opts.option)