diff --git a/dda_lookahead.c b/dda_lookahead.c
index ae8403a..949cc19 100644
--- a/dda_lookahead.c
+++ b/dda_lookahead.c
@@ -21,8 +21,6 @@
 #include "pinio.h"
 #include "memory_barrier.h"
 
-extern uint8_t use_lookahead;
-
 #ifdef DEBUG
   // Total number of moves joined together.
   uint32_t lookahead_joined = 0;