diff --git a/include/libopencm3/stm32/usart.h b/include/libopencm3/stm32/usart.h
index d9f2c8d8..5c7f2851 100644
--- a/include/libopencm3/stm32/usart.h
+++ b/include/libopencm3/stm32/usart.h
@@ -270,8 +270,8 @@
 
 /* CR1_PCE / CR1_PS combined values */
 #define USART_PARITY_NONE		0x00
-#define USART_PARITY_ODD		USART_CR1_PS
-#define USART_PARITY_EVEN		(USART_CR1_PS | USART_CR1_PCE)
+#define USART_PARITY_EVEN		USART_CR1_PCE
+#define USART_PARITY_ODD		(USART_CR1_PS | USART_CR1_PCE)
 #define USART_PARITY_MASK		(USART_CR1_PS | USART_CR1_PCE)
 
 /* CR1_TE/CR1_RE combined values */