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-rw-r--r--src/group_cmd.cpp6
1 files changed, 4 insertions, 2 deletions
diff --git a/src/group_cmd.cpp b/src/group_cmd.cpp
index bf445b3c3..7eaef6b89 100644
--- a/src/group_cmd.cpp
+++ b/src/group_cmd.cpp
@@ -205,8 +205,10 @@ int32 CmdAddVehicleGroup(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
if (!IsValidVehicleID(p2) || (!IsValidGroupID(new_g) && !IsDefaultGroupID(new_g))) return CMD_ERROR;
- Group *g = GetGroup(new_g);
- if (g->owner != _current_player) return CMD_ERROR;
+ if (IsValidGroupID(new_g)) {
+ Group *g = GetGroup(new_g);
+ if (g->owner != _current_player) return CMD_ERROR;
+ }
Vehicle *v = GetVehicle(p2);
if (v->owner != _current_player || (v->type == VEH_TRAIN && !IsFrontEngine(v))) return CMD_ERROR;