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-rw-r--r--src/signs_cmd.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/signs_cmd.cpp b/src/signs_cmd.cpp
index ea6c680c3..22b781b58 100644
--- a/src/signs_cmd.cpp
+++ b/src/signs_cmd.cpp
@@ -81,7 +81,7 @@ CommandCost CmdPlaceSign(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32
CommandCost CmdRenameSign(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
Sign *si = Sign::GetIfValid(p1);
- if (si == NULL) return CMD_ERROR;
+ if (si == nullptr) return CMD_ERROR;
if (si->owner == OWNER_DEITY && _current_company != OWNER_DEITY && _game_mode != GM_EDITOR) return CMD_ERROR;
/* Rename the signs when empty, otherwise remove it */