diff --git a/src/citymania/cm_saveload.cpp b/src/citymania/cm_saveload.cpp
index 9919d44b2f..e6834519ce 100644
--- a/src/citymania/cm_saveload.cpp
+++ b/src/citymania/cm_saveload.cpp
@@ -345,7 +345,7 @@ static void DecodeDataV1(BitIStream &bs) {
     uint n_affected_towns = bs.ReadBytes(2);
     for (uint i = 0; i < n_affected_towns; i++) {
         uint town_id = bs.ReadBytes(2);
-        t = Town::Get(town_id);
+        t = Town::GetIfValid(town_id);
         if (!t) {
             DEBUG(sl, 0, "Invalid TownID in CB towns layout errors (%u)", town_id);
             continue;