diff --git a/CHANGES b/CHANGES
index 2085060..e7e041e 100644
--- a/CHANGES
+++ b/CHANGES
@@ -15,6 +15,8 @@
    #969215)
  - Fix subdomain signing with top-level organizational domain (LP: #1999434)
    - Thanks to Matthias Hunstock for the report and the fix
+ - Fix comma separated list processing in dkimpy_milter/config.py
+   (LP: #1901445)
 
 1.2.2 2020-08-09
  - Improve README.md formating for markdown display on pypi
diff --git a/dkimpy_milter/config.py b/dkimpy_milter/config.py
index d52b5a4..1cad1cd 100644
--- a/dkimpy_milter/config.py
+++ b/dkimpy_milter/config.py
@@ -322,9 +322,15 @@ def _dataset_to_list(dataset):
                 return dsd
         # If it's a str and csl, it has one value and we return a list
         if dataset[:4] == 'csl:':
-            return [dataset[4:].strip().strip(',')]
+            datalist = dataset[4:].split(',')
+            for item in datalist:
+                datalist[datalist.index(item)] = item.strip().strip(',')
+            return datalist
         else:
-            return [dataset.strip().strip(',')]
+            datalist = dataset.split(',')
+            for item in datalist:
+                datalist[datalist.index(item)] = item.strip().strip(',')
+            return datalist
         if dataset[-3:] == '.db' or dataset[:3] == 'db:':
             #  This is a Sleepycat (Oracle) DB  dataset, which we dont support
             raise dkim.ParameterError('Unsupported dataset db datase: {0}'