diff --git a/Lib/fontTools/ttLib/tables/O_S_2f_2.py b/Lib/fontTools/ttLib/tables/O_S_2f_2.py
index 04200cadd..e6bc4bced 100644
--- a/Lib/fontTools/ttLib/tables/O_S_2f_2.py
+++ b/Lib/fontTools/ttLib/tables/O_S_2f_2.py
@@ -3,9 +3,11 @@ from fontTools.misc.py23 import *
 from fontTools.misc import sstruct
 from fontTools.misc.textTools import safeEval, num2binary, binary2num
 from fontTools.ttLib.tables import DefaultTable
-import warnings
+import logging
 
 
+log = logging.getLogger(__name__)
+
 # panose classification
 
 panoseFormat = """
@@ -116,7 +118,7 @@ class table_O_S_2f_2(DefaultTable.DefaultTable):
 			from fontTools import ttLib
 			raise ttLib.TTLibError("unknown format for OS/2 table: version %s" % self.version)
 		if len(data):
-			warnings.warn("too much 'OS/2' table data")
+			log.warning("too much 'OS/2' table data")
 
 		self.panose = sstruct.unpack(panoseFormat, self.panose, Panose())