diff --git a/drivers/usart_regs.h b/drivers/usart_regs.h
index 863ae1d..2c84cc3 100644
--- a/drivers/usart_regs.h
+++ b/drivers/usart_regs.h
@@ -161,18 +161,18 @@ union USART_CR3 {
 	uint32_t word;
 };
 
-#define UART_CR3_EIE       reg_def( 0,  1)
-#define UART_CR3_IREN      reg_def( 1,  1)
-#define UART_CR3_IRLP      reg_def( 2,  1)
-#define UART_CR3_HDSEL     reg_def( 3,  1)
-#define UART_CR3_NACK      reg_def( 4,  1)
-#define UART_CR3_SCEN      reg_def( 5,  1)
-#define UART_CR3_DMAR      reg_def( 6,  1)
-#define UART_CR3_DMAT      reg_def( 7,  1)
-#define UART_CR3_RTSE      reg_def( 8,  1)
-#define UART_CR3_CTSE      reg_def( 9,  1)
-#define UART_CR3_CTSIE     reg_def(10,  1)
-#define UART_CR3_reserved3 reg_def(11, 21)
+#define USART_CR3_EIE       reg_def( 0,  1)
+#define USART_CR3_IREN      reg_def( 1,  1)
+#define USART_CR3_IRLP      reg_def( 2,  1)
+#define USART_CR3_HDSEL     reg_def( 3,  1)
+#define USART_CR3_NACK      reg_def( 4,  1)
+#define USART_CR3_SCEN      reg_def( 5,  1)
+#define USART_CR3_DMAR      reg_def( 6,  1)
+#define USART_CR3_DMAT      reg_def( 7,  1)
+#define USART_CR3_RTSE      reg_def( 8,  1)
+#define USART_CR3_CTSE      reg_def( 9,  1)
+#define USART_CR3_CTSIE     reg_def(10,  1)
+#define USART_CR3_reserved3 reg_def(11, 21)
 
 union USART_GTPR {
 	struct __attribute__((packed)) {
@@ -187,7 +187,7 @@ union USART_GTPR {
 #define USART_GTPR_GT        reg_def( 8,  8)
 #define USART_GTPR_reserved1 reg_def(16, 16)
 
-struct __attribute__((packed)) USART {
+struct USART {
 	union USART_SR SR;
 	union USART_DR DR;
 	union USART_BRR BRR;