diff --git a/pydeeptools/deeptools/multiBamSummary.py b/pydeeptools/deeptools/multiBamSummary.py
index 981a99e3c2..7b36746a2d 100644
--- a/pydeeptools/deeptools/multiBamSummary.py
+++ b/pydeeptools/deeptools/multiBamSummary.py
@@ -242,7 +242,7 @@ def main(args=None):
         blackListFileName=args.blackListFileName,
         extendReads=args.extendReads,
         minMappingQuality=args.minMappingQuality,
-        ignoreDuplicates=args.ignoreDuplicates,
+        ignoreDuplicates=False,
         center_read=args.centerReads,
         samFlag_include=args.samFlagInclude,
         samFlag_exclude=args.samFlagExclude,