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-rw-r--r--src/autoreplace_cmd.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/autoreplace_cmd.cpp b/src/autoreplace_cmd.cpp
index 0cafcaf1d..f162f0d3f 100644
--- a/src/autoreplace_cmd.cpp
+++ b/src/autoreplace_cmd.cpp
@@ -93,7 +93,7 @@ bool CheckAutoreplaceValidity(EngineID from, EngineID to, PlayerID player)
*/
static void TransferCargo(Vehicle *old_veh, Vehicle *new_head, bool part_of_chain)
{
- assert(!part_of_chain || IsFrontEngine(new_head));
+ assert(!part_of_chain || new_head->IsPrimaryVehicle());
/* Loop through source parts */
for (Vehicle *src = old_veh; src != NULL; src = src->Next()) {
if (!part_of_chain && src->type == VEH_TRAIN && src != old_veh && src != old_veh->u.rail.other_multiheaded_part && !IsArticulatedPart(src)) {