1 files changed, 1 insertions, 1 deletions
diff --git a/signs.h b/signs.h
index 4fffbb7b2..fd8ba206c 100644
--- a/signs.h
+++ b/signs.h
@@ -24,7 +24,7 @@ static inline SignStruct *GetSign(uint index)
 
 VARDEF SignStruct *_new_sign_struct;
 
-void UpdateAllSignVirtCoords();
+void UpdateAllSignVirtCoords(void);
 void PlaceProc_Sign(uint tile);
 
 /* misc.c */