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-rw-r--r--src/terraform_gui.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/terraform_gui.cpp b/src/terraform_gui.cpp
index f33db131a..f074d64eb 100644
--- a/src/terraform_gui.cpp
+++ b/src/terraform_gui.cpp
@@ -26,6 +26,7 @@ void CcTerraform(bool success, TileIndex tile, uint32 p1, uint32 p2)
if (success) {
SndPlayTileFx(SND_1F_SPLAT, tile);
} else {
+ extern TileIndex _terraform_err_tile;
SetRedErrorSquare(_terraform_err_tile);
}
}