diff --git a/drivers/char/mwave/mwavedd.c b/drivers/char/mwave/mwavedd.c
index 8666171e187b0cf1b53437308566d0ef48b8de9e..d3ba2f860ef02626a2d73c5f222a16051d5bab7f 100644
--- a/drivers/char/mwave/mwavedd.c
+++ b/drivers/char/mwave/mwavedd.c
@@ -271,7 +271,7 @@ static int mwave_ioctl(struct inode *inode, struct file *file,
 				ipcnum,
 				pDrvData->IPCs[ipcnum].usIntCount);
 	
-			if (ipcnum > ARRAY_SIZE(pDrvData->IPCs)) {
+			if (ipcnum >= ARRAY_SIZE(pDrvData->IPCs)) {
 				PRINTK_ERROR(KERN_ERR_MWAVE
 						"mwavedd::mwave_ioctl:"
 						" IOCTL_MW_REGISTER_IPC:"