diff --git a/src/saveload/extended_ver_sl.cpp b/src/saveload/extended_ver_sl.cpp
index c84ce9f578..8350bb363c 100644
--- a/src/saveload/extended_ver_sl.cpp
+++ b/src/saveload/extended_ver_sl.cpp
@@ -45,7 +45,7 @@ std::vector<uint32> _sl_xv_discardable_chunk_ids;           ///< list of chunks
 static const uint32 _sl_xv_slxi_chunk_version = 0;          ///< current version os SLXI chunk
 
 const SlxiSubChunkInfo _sl_xv_sub_chunk_infos[] = {
-	{ XSLFI_VARIABLE_DAY_LENGTH,    XSCF_NULL,              1,                                    1, "variable_day_length",   NULL, NULL, NULL        },
+	{ XSLFI_VARIABLE_DAY_LENGTH,    XSCF_NULL,              2,                                    2, "variable_day_length",   NULL, NULL, NULL        },
 	{ XSLFI_NULL, XSCF_NULL, 0, 0, NULL, NULL, NULL, NULL },// This is the end marker
 };
 
diff --git a/src/saveload/vehicle_sl.cpp b/src/saveload/vehicle_sl.cpp
index 86ca590e4d..320827b07a 100644
--- a/src/saveload/vehicle_sl.cpp
+++ b/src/saveload/vehicle_sl.cpp
@@ -625,7 +625,8 @@ const SaveLoad *GetVehicleDescription(VehicleType vt)
 
 		     SLE_VAR(Vehicle, day_counter,           SLE_UINT8),
 		     SLE_VAR(Vehicle, tick_counter,          SLE_UINT8),
-		 SLE_CONDVAR(Vehicle, running_ticks,         SLE_UINT8,                   88, SL_MAX_VERSION),
+		SLE_CONDVAR_X(Vehicle, running_ticks,        SLE_FILE_U8  | SLE_VAR_U16,  88, SL_MAX_VERSION, SlXvFeatureTest(XSLFTO_AND, XSLFI_VARIABLE_DAY_LENGTH, 0, 1)),
+		SLE_CONDVAR_X(Vehicle, running_ticks,        SLE_UINT16,                  88, SL_MAX_VERSION, SlXvFeatureTest(XSLFTO_AND, XSLFI_VARIABLE_DAY_LENGTH, 2)),
 
 		     SLE_VAR(Vehicle, cur_implicit_order_index,  SLE_UINT8),
 		 SLE_CONDVAR(Vehicle, cur_real_order_index,  SLE_UINT8,                  158, SL_MAX_VERSION),
diff --git a/src/vehicle_base.h b/src/vehicle_base.h
index f2a02072a2..d0c096ae5b 100644
--- a/src/vehicle_base.h
+++ b/src/vehicle_base.h
@@ -311,7 +311,7 @@ public:
 
 	byte day_counter;                   ///< Increased by one for each day
 	byte tick_counter;                  ///< Increased by one for each tick
-	byte running_ticks;                 ///< Number of ticks this vehicle was not stopped this day
+	uint16 running_ticks;               ///< Number of ticks this vehicle was not stopped this day
 
 	byte vehstatus;                     ///< Status
 	Order current_order;                ///< The current order (+ status, like: loading)