diff --git a/src/saveload/oldloader.cpp b/src/saveload/oldloader.cpp
index 1d17cb55cc..5c1dd39ef5 100644
--- a/src/saveload/oldloader.cpp
+++ b/src/saveload/oldloader.cpp
@@ -163,6 +163,7 @@ bool LoadChunk(LoadgameState *ls, void *base, const OldChunks *chunks)
 					case OC_VAR_I32:*(int32 *)ptr = res; break;
 					case OC_VAR_U32:*(uint32*)ptr = res; break;
 					case OC_VAR_I64:*(int64 *)ptr = res; break;
+					case OC_VAR_U64:*(uint64*)ptr = res; break;
 					default: NOT_REACHED();
 				}
 
diff --git a/src/saveload/oldloader.h b/src/saveload/oldloader.h
index c449c8cd43..c6b073b285 100644
--- a/src/saveload/oldloader.h
+++ b/src/saveload/oldloader.h
@@ -47,6 +47,7 @@ enum OldChunkType {
 	OC_VAR_I32   = 5 << 8,
 	OC_VAR_U32   = 6 << 8,
 	OC_VAR_I64   = 7 << 8,
+	OC_VAR_U64   = 8 << 8,
 	/* 8 bits allocated (256 max) */
 
 	OC_FILE_I8   = 1 << 16,
diff --git a/src/saveload/oldloader_sl.cpp b/src/saveload/oldloader_sl.cpp
index bae21a99cd..1de4070826 100644
--- a/src/saveload/oldloader_sl.cpp
+++ b/src/saveload/oldloader_sl.cpp
@@ -777,10 +777,10 @@ static const OldChunks station_chunk[] = {
 	OCL_SVAR(  OC_UINT8, Station, owner ),
 	OCL_SVAR(  OC_UINT8, Station, facilities ),
 	OCL_SVAR( OC_TTD | OC_UINT8, Station, airport_type ),
-	OCL_SVAR( OC_TTO | OC_FILE_U16 | OC_VAR_U32, Station, airport_flags ),
+	OCL_SVAR( OC_TTO | OC_FILE_U16 | OC_VAR_U64, Station, airport_flags ),
 	OCL_NULL( 3 ),          ///< bus/truck status, blocked months, no longer in use
 	OCL_CNULL( OC_TTD, 1 ), ///< unknown
-	OCL_SVAR( OC_TTD | OC_FILE_U16 | OC_VAR_U32, Station, airport_flags ),
+	OCL_SVAR( OC_TTD | OC_FILE_U16 | OC_VAR_U64, Station, airport_flags ),
 	OCL_CNULL( OC_TTD, 2 ), ///< last_vehicle. now last_vehicle_type
 	OCL_CNULL( OC_TTD, 4 ), ///< junk at end of chunk