diff --git a/hardware0.hpp b/hardware0.hpp
index a171aab..848bbdc 100644
--- a/hardware0.hpp
+++ b/hardware0.hpp
@@ -59,22 +59,22 @@ constexpr int operator<<(const int &lhs, const ControlFlagsB0 &rhs) { return lhs
 constexpr int operator<<(const int &lhs, const ControlFlagsC0 &rhs) { return lhs << static_cast<int>(rhs); }
 // clang-format on
 
-static void (*fnDataReg0EmptyIntHandler)() = nullptr;
 static void (*fnRx0IntHandler)() = nullptr;
+static void (*fnDataReg0EmptyIntHandler)() = nullptr;
 static void (*fnTx0IntHandler)() = nullptr;
 
-ISR(USART0_UDRE_vect)
-{
-	if (fnDataReg0EmptyIntHandler)
-		fnDataReg0EmptyIntHandler();
-}
-
 ISR(USART0_RX_vect)
 {
 	if (fnRx0IntHandler)
 		fnRx0IntHandler();
 }
 
+ISR(USART0_UDRE_vect)
+{
+	if (fnDataReg0EmptyIntHandler)
+		fnDataReg0EmptyIntHandler();
+}
+
 ISR(USART0_TX_vect)
 {
 	if (fnTx0IntHandler)
@@ -120,8 +120,8 @@ class Hardware0<mode, cfg, Driven::INTERRUPT> {
 
 	static void init() FORCE_INLINE
 	{
-		detail::fnDataReg0EmptyIntHandler = dataRegEmptyIntHandler;
 		detail::fnRx0IntHandler = rxIntHandler;
+		detail::fnDataReg0EmptyIntHandler = dataRegEmptyIntHandler;
 		detail::fnTx0IntHandler = txIntHandler;
 
 		HardwareImpl::init();
@@ -140,12 +140,12 @@ class Hardware0<mode, cfg, Driven::INTERRUPT> {
 	using HardwareImpl = detail::Hardware<detail::Registers0, detail::ControlFlagsA0, detail::ControlFlagsB0,
 	                                      detail::ControlFlagsC0, cfg, mode, Driven::INTERRUPT>;
 
-	static void dataRegEmptyIntHandler()
+	static void rxIntHandler()
 	{
 		// TODO
 	}
 
-	static void rxIntHandler()
+	static void dataRegEmptyIntHandler()
 	{
 		// TODO
 	}
diff --git a/hardware1.hpp b/hardware1.hpp
index 6e9c47b..78b28ca 100644
--- a/hardware1.hpp
+++ b/hardware1.hpp
@@ -59,22 +59,22 @@ constexpr int operator<<(const int &lhs, const ControlFlagsB1 &rhs) { return lhs
 constexpr int operator<<(const int &lhs, const ControlFlagsC1 &rhs) { return lhs << static_cast<int>(rhs); }
 // clang-format on
 
-static void (*fnDataReg1EmptyIntHandler)() = nullptr;
 static void (*fnRx1IntHandler)() = nullptr;
+static void (*fnDataReg1EmptyIntHandler)() = nullptr;
 static void (*fnTx1IntHandler)() = nullptr;
 
-ISR(USART1_UDRE_vect)
-{
-	if (fnDataReg1EmptyIntHandler)
-		fnDataReg1EmptyIntHandler();
-}
-
 ISR(USART1_RX_vect)
 {
 	if (fnRx1IntHandler)
 		fnRx1IntHandler();
 }
 
+ISR(USART1_UDRE_vect)
+{
+	if (fnDataReg1EmptyIntHandler)
+		fnDataReg1EmptyIntHandler();
+}
+
 ISR(USART1_TX_vect)
 {
 	if (fnTx1IntHandler)
@@ -124,8 +124,8 @@ class Hardware1<mode, cfg, Driven::INTERRUPT> {
 
 	static void init() FORCE_INLINE
 	{
-		detail::fnDataReg1EmptyIntHandler = dataRegEmptyIntHandler;
 		detail::fnRx1IntHandler = rxIntHandler;
+		detail::fnDataReg1EmptyIntHandler = dataRegEmptyIntHandler;
 		detail::fnTx1IntHandler = txIntHandler;
 
 		HardwareImpl::init();
@@ -144,12 +144,12 @@ class Hardware1<mode, cfg, Driven::INTERRUPT> {
 	using HardwareImpl = detail::Hardware<detail::Registers1, detail::ControlFlagsA1, detail::ControlFlagsB1,
 	                                      detail::ControlFlagsC1, cfg, mode, Driven::INTERRUPT>;
 
-	static void dataRegEmptyIntHandler()
+	static void rxIntHandler()
 	{
 		// TODO
 	}
 
-	static void rxIntHandler()
+	static void dataRegEmptyIntHandler()
 	{
 		// TODO
 	}