diff --git a/src/saveload/extended_ver_sl.cpp b/src/saveload/extended_ver_sl.cpp
index 1b6e1c6940..232a96681d 100644
--- a/src/saveload/extended_ver_sl.cpp
+++ b/src/saveload/extended_ver_sl.cpp
@@ -80,6 +80,7 @@ const SlxiSubChunkInfo _sl_xv_sub_chunk_infos[] = {
 	{ XSLFI_MORE_TOWN_GROWTH_RATES, XSCF_NULL,                1,   1, "more_town_growth_rates",    NULL, NULL, NULL        },
 	{ XSLFI_MULTIPLE_DOCKS,         XSCF_NULL,                1,   1, "multiple_docks",            NULL, NULL, "DOCK"      },
 	{ XSLFI_TIMETABLE_EXTRA,        XSCF_NULL,                1,   1, "timetable_extra",           NULL, NULL, "ORDX"      },
+	{ XSLFI_TRAIN_FLAGS_EXTRA,      XSCF_NULL,                1,   1, "train_flags_extra",         NULL, NULL, NULL        },
 	{ XSLFI_NULL, XSCF_NULL, 0, 0, NULL, NULL, NULL, NULL },// This is the end marker
 };
 
diff --git a/src/saveload/extended_ver_sl.h b/src/saveload/extended_ver_sl.h
index e190b2b805..1afc8d1b86 100644
--- a/src/saveload/extended_ver_sl.h
+++ b/src/saveload/extended_ver_sl.h
@@ -54,6 +54,7 @@ enum SlXvFeatureIndex {
 	XSLFI_MORE_TOWN_GROWTH_RATES,                 ///< More town growth rates
 	XSLFI_MULTIPLE_DOCKS,                         ///< Multiple docks
 	XSLFI_TIMETABLE_EXTRA,                        ///< Vehicle timetable extra fields
+	XSLFI_TRAIN_FLAGS_EXTRA,                      ///< Train flags field extra size
 
 	XSLFI_RIFF_HEADER_60_BIT,                     ///< Size field in RIFF chunk header is 60 bit
 	XSLFI_HEIGHT_8_BIT,                           ///< Map tile height is 8 bit instead of 4 bit, but savegame version may be before this became true in trunk
diff --git a/src/saveload/vehicle_sl.cpp b/src/saveload/vehicle_sl.cpp
index ebd2d77abb..a136d06187 100644
--- a/src/saveload/vehicle_sl.cpp
+++ b/src/saveload/vehicle_sl.cpp
@@ -744,8 +744,9 @@ const SaveLoad *GetVehicleDescription(VehicleType vt)
 		     SLE_VAR(Train, railtype,            SLE_UINT8),
 		     SLE_VAR(Train, track,               SLE_UINT8),
 
-		 SLE_CONDVAR(Train, flags,               SLE_FILE_U8  | SLE_VAR_U16,   2,  99),
-		 SLE_CONDVAR(Train, flags,               SLE_UINT16,                 100, SL_MAX_VERSION),
+		 SLE_CONDVAR(Train, flags,               SLE_FILE_U8  | SLE_VAR_U32,   2,  99),
+		SLE_CONDVAR_X(Train, flags,              SLE_FILE_U16 | SLE_VAR_U32, 100, SL_MAX_VERSION, SlXvFeatureTest(XSLFTO_AND, XSLFI_TRAIN_FLAGS_EXTRA, 0, 0)),
+		SLE_CONDVAR_X(Train, flags,              SLE_UINT32,                   0, SL_MAX_VERSION, SlXvFeatureTest(XSLFTO_AND, XSLFI_TRAIN_FLAGS_EXTRA, 1)),
 		SLE_CONDNULL(2, 2, 59),
 
 		 SLE_CONDVAR(Train, wait_counter,        SLE_UINT16,                 136, SL_MAX_VERSION),
diff --git a/src/train.h b/src/train.h
index bd9522bfde..18e8671013 100644
--- a/src/train.h
+++ b/src/train.h
@@ -104,9 +104,10 @@ struct Train FINAL : public GroundVehicle<Train, VEH_TRAIN> {
 	/* Link between the two ends of a multiheaded engine */
 	Train *other_multiheaded_part;
 
+	uint32 flags;
+
 	uint16 crash_anim_pos; ///< Crash animation counter.
 
-	uint16 flags;
 	TrackBitsByte track;
 	TrainForceProceedingByte force_proceed;
 	RailTypeByte railtype;