diff --git a/include/libopencm3/lpc43xx/i2c.h b/include/libopencm3/lpc43xx/i2c.h
index b163af8b..29e797e5 100644
--- a/include/libopencm3/lpc43xx/i2c.h
+++ b/include/libopencm3/lpc43xx/i2c.h
@@ -131,7 +131,7 @@
 #define I2C_WRITE           0
 #define I2C_READ            1
 
-/* --- I2C funtion prototypes----------------------------------------------- */
+/* --- I2C function prototypes --------------------------------------------- */
 
 BEGIN_DECLS
 
diff --git a/include/libopencm3/stm32/sdio.h b/include/libopencm3/stm32/sdio.h
index cf9b056e..16244ed5 100644
--- a/include/libopencm3/stm32/sdio.h
+++ b/include/libopencm3/stm32/sdio.h
@@ -142,7 +142,7 @@
 #define SDIO_CMD_WAITRESP_SHIFT		6
 /* 00: No response, expect CMDSENT flag */
 #define SDIO_CMD_WAITRESP_NO_0		(0x0 << SDIO_CMD_WAITRESP_SHIFT)
-/* 01: Short response, expect CMDREND or CCRCFAIL flag
+/* 01: Short response, expect CMDREND or CCRCFAIL flag */
 #define SDIO_CMD_WAITRESP_SHORT		(0x1 << SDIO_CMD_WAITRESP_SHIFT)
 /* 10: No response, expect CMDSENT flag */
 #define SDIO_CMD_WAITRESP_NO_2		(0x2 << SDIO_CMD_WAITRESP_SHIFT)