diff --git a/drivers/char/rio/rio_linux.c b/drivers/char/rio/rio_linux.c
index 85c1618452605819fa2110f9a68cb208dc46df84..294e9cb0c449424cdb47761712cf2db51b7fb259 100644
--- a/drivers/char/rio/rio_linux.c
+++ b/drivers/char/rio/rio_linux.c
@@ -1146,7 +1146,7 @@ static int __init rio_init(void)
 				rio_dprintk(RIO_DEBUG_INIT, "Enabling interrupts on rio card.\n");
 				hp->Mode |= RIO_PCI_INT_ENABLE;
 			} else
-				hp->Mode &= !RIO_PCI_INT_ENABLE;
+				hp->Mode &= ~RIO_PCI_INT_ENABLE;
 			rio_dprintk(RIO_DEBUG_INIT, "New Mode: %x\n", hp->Mode);
 			rio_start_card_running(hp);
 		}