diff --git a/src/fprime/common/models/serialize/array_type.py b/src/fprime/common/models/serialize/array_type.py
index d30a9b9c..108c60d3 100644
--- a/src/fprime/common/models/serialize/array_type.py
+++ b/src/fprime/common/models/serialize/array_type.py
@@ -119,4 +119,4 @@ def deserialize(self, data, offset):
 
     def getSize(self):
         """Return the size of the array"""
-        return sum([item.getSize() for item in self._val])
+        return sum(item.getSize() for item in self._val)