diff --git a/src/mklev.c b/src/mklev.c
index 85438214e..ca73c791c 100644
--- a/src/mklev.c
+++ b/src/mklev.c
@@ -19,7 +19,6 @@ static void mksink(struct mkroom *);
 static void mkaltar(struct mkroom *);
 static void mkgrave(struct mkroom *);
 static void makevtele(void);
-void clear_level_structures(void);
 static void fill_ordinary_room(struct mkroom *, boolean) NONNULLARG1;
 static void makelevel(void);
 static boolean bydoor(coordxy, coordxy);