diff --git a/drivers/rcc.h b/drivers/rcc.h
index 9869e06..61a5307 100644
--- a/drivers/rcc.h
+++ b/drivers/rcc.h
@@ -75,7 +75,7 @@ enum RccApb1 {
  */
 enum RccApb2 {
 	RCC_APB2_NONE  = 0,
-	RCC_APB2_AFOI  = (0x1 <<  0),
+	RCC_APB2_AFIO  = (0x1 <<  0),
 	RCC_APB2_IOPA  = (0x1 <<  2),
 	RCC_APB2_IOPB  = (0x1 <<  3),
 	RCC_APB2_IOPC  = (0x1 <<  4),