diff --git a/src/boards/183.c b/src/boards/183.c
index c1bf1dd..85a9822 100644
--- a/src/boards/183.c
+++ b/src/boards/183.c
@@ -22,7 +22,6 @@
 #include "vrc2and4.h"
 
 static uint8  prg;
-static uint16 irqCounter;
 
 static SFORMAT Mapper183_stateRegs[] ={
 	{ &prg, 1, "PRG6" },