diff --git a/bob/bio/base/script/evaluate.py b/bob/bio/base/script/evaluate.py
index 5ceaeb81da5322c9180589b8fbceb1414afcdad1..2d1ba1ebfcf0b519634fca64cc76de517612d9a2 100644
--- a/bob/bio/base/script/evaluate.py
+++ b/bob/bio/base/script/evaluate.py
@@ -10,7 +10,6 @@ from __future__ import print_function
 
 # matplotlib stuff
 import matplotlib
-matplotlib.use('pdf')  # avoids TkInter threaded start
 from matplotlib import pyplot
 pyplot.ioff() # turn off interactive mode -- no figure window will be shown
 from matplotlib.backends.backend_pdf import PdfPages