diff --git a/source/common/utility/tarray.h b/source/common/utility/tarray.h
index ab30e0095..4f5467921 100644
--- a/source/common/utility/tarray.h
+++ b/source/common/utility/tarray.h
@@ -1703,6 +1703,11 @@ public:
 	{
 		memset(&bytes[0], 0, bytes.Size());
 	}
+
+	TArray<uint8_t> &Storage()
+	{
+		return bytes;
+	}
 };
 
 
diff --git a/source/games/sw/src/save.cpp b/source/games/sw/src/save.cpp
index 09bc6c6d4..0b2b1b5be 100644
--- a/source/games/sw/src/save.cpp
+++ b/source/games/sw/src/save.cpp
@@ -819,24 +819,24 @@ FSerializer& Serialize(FSerializer& arc, const char* keyname, SECT_USER& w, SECT
 
 void SerializeSectUser(FSerializer& arc)
 {
-	FixedBitArray<MAXSECTORS> hitlist;
+	BitArray hitlist(numsectors);
 
 	if (arc.isWriting())
 	{
-		for (int i = 0; i < MAXSECTORS; i++)
+		for (int i = 0; i < numsectors; i++)
 		{
 			hitlist.Set(i, !!SectUser[i].Data());
 		}
 	}
 	else
 	{
-		for (int i = 0; i < MAXSECTORS; i++)
+		for (int i = 0; i < numsectors; i++)
 		{
 			SectUser[i].Clear();
 		}
 	}
-	arc("sectusermap", hitlist);
-	arc.SparseArray("sectuser", SectUser, MAXSECTORS, hitlist);
+	arc.SerializeMemory("sectusermap", hitlist.Storage().Data(), hitlist.Storage().Size());
+	arc.SparseArray("sectuser", SectUser, numsectors, hitlist);
 }
 
 //---------------------------------------------------------------------------