diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c
index a420e8d437dd01c6a30d5e5446718797ce51dcb3..13f8871e5b2177bb844018f6543ca2e690e973b6 100644
--- a/drivers/char/mxser.c
+++ b/drivers/char/mxser.c
@@ -2711,7 +2711,7 @@ static int __init mxser_module_init(void)
 			continue;
 
 		brd = &mxser_boards[m];
-		retval = mxser_get_ISA_conf(!ioaddr[b], brd);
+		retval = mxser_get_ISA_conf(ioaddr[b], brd);
 		if (retval <= 0) {
 			brd->info = NULL;
 			continue;