diff --git a/pic.c b/pic.c
index 1142ebf..a5fee49 100644
--- a/pic.c
+++ b/pic.c
@@ -49,7 +49,7 @@ void enableIrq(int irq)
 		outb(PIC_MASTER_DATA, (status | (1 << irq)));
 	} else {
 		uint8_t status = inb(PIC_SLAVE_DATA);
-		outb(PIC_SLAVE_DATA, (status | (1 << irq)));
+		outb(PIC_SLAVE_DATA, (status | (1 << (irq - 8))));
 	}
 }
 
@@ -60,6 +60,6 @@ void disableIrq(int irq)
 		outb(PIC_MASTER_DATA, (status & ~(1 << irq)));
 	} else {
 		uint8_t status = inb(PIC_SLAVE_DATA);
-		outb(PIC_SLAVE_DATA, (status & ~(1 << irq)));
+		outb(PIC_SLAVE_DATA, (status & ~(1 << (irq - 8))));
 	}
 }