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-rw-r--r--src/economy.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/economy.cpp b/src/economy.cpp
index b7eb0c65f..47246f7c5 100644
--- a/src/economy.cpp
+++ b/src/economy.cpp
@@ -1368,7 +1368,7 @@ int LoadUnloadVehicle(Vehicle *v, bool just_arrived)
for (; v != NULL; v = v->next) {
GoodsEntry* ge;
load_amount = EngInfo(v->engine_type)->load_amount;
- if (_patches.gradual_loading) {
+ if (_patches.gradual_loading && HASBIT(EngInfo(v->engine_type)->callbackmask, CBM_LOAD_AMOUNT)) {
uint16 cb_load_amount = GetVehicleCallback(CBID_VEHICLE_LOAD_AMOUNT, 0, 0, v->engine_type, v);
if (cb_load_amount != CALLBACK_FAILED) load_amount = cb_load_amount & 0xFF;
}