diff --git a/CHANGES.txt b/CHANGES.txt
index 28780ef0..5f0bf0f0 100755
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -6,6 +6,7 @@
 * documentation changes to improve ESS tab, table constraints have been lifted & sphinx_rtd_theme to v2.0.0
 * upload artifact in gh test runner pinned to 3
 * Try to get the number of processors from sched_getaffinity, to avoid using to many in job submissions for example. #1199
+* Fix typo in estimateScaleFactor that fixes broken argparsing. #1286
 
 3.5.4
 * error handling and cases for bwAverage with >2 samples
diff --git a/deeptools/estimateScaleFactor.py b/deeptools/estimateScaleFactor.py
index 549ecf78..97869a7b 100644
--- a/deeptools/estimateScaleFactor.py
+++ b/deeptools/estimateScaleFactor.py
@@ -98,7 +98,7 @@ def main(args=None):
     between to samples
 
     """
-    args = parseArguments().parse_args(args)
+    args = parseArguments(args)
     if len(args.bamfiles) > 2:
         print("SES method to estimate scale factors only works for two samples")
         exit(0)