diff --git a/src/mame/machine/neocrypt.c b/src/mame/machine/neocrypt.c
index 3a2df226dd2..91e82970bef 100644
--- a/src/mame/machine/neocrypt.c
+++ b/src/mame/machine/neocrypt.c
@@ -1523,7 +1523,6 @@ void neogeo_cmc50_m1_decrypt(running_machine *machine, UINT16 key)
 // if using key 0x1543 (same as mslug5) we need a different bitswap here
 int m1_alt_address_scramble(int address/*, UINT16 key*/)
 {
-	int block;
 	int aux;
 	UINT16 key = 0x1543;