diff --git a/tools/sigma/backends/sumologic.py b/tools/sigma/backends/sumologic.py
index a2eb4ff3d..7548bb554 100644
--- a/tools/sigma/backends/sumologic.py
+++ b/tools/sigma/backends/sumologic.py
@@ -187,6 +187,8 @@ class SumoLogicBackend(SingleTextQueryBackend):
                 return self.mapExpression % (key, self.cleanValue(value, key))
             elif type(value) is list:
                 return self.generateMapItemListNode(key, value)
+            elif value is None:
+                return self.nullExpression % (key, )
             else:
                 raise TypeError("Backend does not support map values of type " + str(type(value)))
         else: