diff --git a/src/column.c b/src/column.c
index 60f87ad..5539030 100644
--- a/src/column.c
+++ b/src/column.c
@@ -1,8 +1,5 @@
 #include <sodium.h>
 #include <stdio.h>
-extern int grid [2][18][8];
-extern int tile_current[3];
-extern int tile_next[3];
 
 /********************
  * tile colours	    *