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-rw-r--r--src/signs_func.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/signs_func.h b/src/signs_func.h
index 44a3237d2..06242eb2f 100644
--- a/src/signs_func.h
+++ b/src/signs_func.h
@@ -11,6 +11,8 @@ extern SignID _new_sign_id;
void UpdateAllSignVirtCoords();
void PlaceProc_Sign(TileIndex tile);
+void MarkSignDirty(Sign *si);
+void UpdateSignVirtCoords(Sign *si);
/* signs_gui.cpp */
void ShowRenameSignWindow(const Sign *si);