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-rw-r--r--src/rail_gui.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/rail_gui.h b/src/rail_gui.h
index 67d590211..baaed991e 100644
--- a/src/rail_gui.h
+++ b/src/rail_gui.h
@@ -9,5 +9,6 @@
void ShowBuildRailToolbar(RailType railtype, int button);
void ReinitGuiAfterToggleElrail(bool disable);
+int32 ResetSignalVariant(int32 = 0);
#endif /* RAIL_GUI_H */