diff --git a/src/boards/mmc3.c b/src/boards/mmc3.c
index 0698d85..3fbfd22 100644
--- a/src/boards/mmc3.c
+++ b/src/boards/mmc3.c
@@ -28,7 +28,6 @@
 #include "mmc3.h"
 
 uint8 MMC3_cmd;
-uint8 kt_extra;
 uint8 *WRAM;
 uint32 WRAMSIZE;
 uint8 *CHRRAM;