diff --git a/Autocoders/Python/bin/tlm_packet_gen.py b/Autocoders/Python/bin/tlm_packet_gen.py
index ec94a0f6b8..bc09901302 100755
--- a/Autocoders/Python/bin/tlm_packet_gen.py
+++ b/Autocoders/Python/bin/tlm_packet_gen.py
@@ -495,9 +495,10 @@ def process_serializable_files(self, serializable_file_list):
                         % (member_type, serializable_type)
                     )
                     sys.exit(-1)
-                serializable_size += type_size
                 if member_array_size != None:
-                    serializable_size *= member_array_size
+                    serializable_size += int(member_array_size) * type_size
+                else:
+                    serializable_size += type_size
             self.add_type_size(serializable_type, serializable_size)
             if self.verbose:
                 print(
diff --git a/Ref/TypeDemo/TypeDemo.fpp b/Ref/TypeDemo/TypeDemo.fpp
index 77537b5288..9c04c70a31 100644
--- a/Ref/TypeDemo/TypeDemo.fpp
+++ b/Ref/TypeDemo/TypeDemo.fpp
@@ -31,6 +31,8 @@ module Ref {
         separateChoice: Choice
         @ A pair of choices
         choicePair: ChoicePair
+        @ An array of choices defined as member array
+        choiceAsMemberArray: [dimension] U8
     }
 
     @ Set of floating points to emit