diff --git a/keen.c b/keen.c
index 8133183..feee59c 100644
--- a/keen.c
+++ b/keen.c
@@ -1748,8 +1748,8 @@ static void game_free_drawstate(drawing *dr, game_drawstate *ds)
     sfree(ds);
 }
 
-void draw_tile(drawing *dr, game_drawstate *ds, struct clues *clues,
-	       int x, int y, long tile)
+static void draw_tile(drawing *dr, game_drawstate *ds, struct clues *clues,
+		      int x, int y, long tile)
 {
     int w = clues->w /* , a = w*w */;
     int tx, ty, tw, th;
diff --git a/unfinished/group.c b/unfinished/group.c
index 142654c..5dcf586 100644
--- a/unfinished/group.c
+++ b/unfinished/group.c
@@ -1316,8 +1316,8 @@ static void game_free_drawstate(drawing *dr, game_drawstate *ds)
     sfree(ds);
 }
 
-void draw_tile(drawing *dr, game_drawstate *ds, int x, int y, long tile,
-	       long pencil, long error)
+static void draw_tile(drawing *dr, game_drawstate *ds, int x, int y, long tile,
+		      long pencil, long error)
 {
     int w = ds->w /* , a = w*w */;
     int tx, ty, tw, th;