diff --git a/hardware.hpp b/hardware.hpp
index ff3f960..1efcef2 100644
--- a/hardware.hpp
+++ b/hardware.hpp
@@ -67,10 +67,12 @@ class Hardware {
 		constexpr uint8_t ControlRegB = DataBitsValues.regBVal | EnableRx | EnableTx | InterruptVal;
 		constexpr uint8_t ControlRegC = DataBitsValues.regCVal | ParityVal | StopBitsVal | ModeVal;
 
+		auto ctrlStatRegA = getRegPtr<Registers::CTRL_STAT_REG_A_ADDR>();
+
 		if constexpr (UseDoubleSpeed)
-			*getRegPtr<Registers::CTRL_STAT_REG_A_ADDR>() |= (1 << CtrlFlagsA::SPEED_2X);
+			*ctrlStatRegA = *ctrlStatRegA | (1 << CtrlFlagsA::SPEED_2X);
 		else
-			*getRegPtr<Registers::CTRL_STAT_REG_A_ADDR>() &= ~(1 << CtrlFlagsA::SPEED_2X);
+			*ctrlStatRegA = *ctrlStatRegA & ~(1 << CtrlFlagsA::SPEED_2X);
 
 		*getRegPtr<Registers::CTRL_STAT_REG_B_ADDR>() = ControlRegB;
 		*getRegPtr<Registers::CTRL_STAT_REG_C_ADDR>() = ControlRegC;
@@ -130,12 +132,14 @@ class Hardware {
 
 	static void enableDataRegEmptyInt() FORCE_INLINE
 	{
-		*getRegPtr<Registers::CTRL_STAT_REG_B_ADDR>() |= (1 << CtrlFlagsB::DATA_REG_EMPTY_INT_ENABLE);
+		auto ctrlStatRegB = getRegPtr<Registers::CTRL_STAT_REG_B_ADDR>();
+		*ctrlStatRegB = *ctrlStatRegB | (1 << CtrlFlagsB::DATA_REG_EMPTY_INT_ENABLE);
 	}
 
 	static void disableDataRegEmptyInt() FORCE_INLINE
 	{
-		*getRegPtr<Registers::CTRL_STAT_REG_B_ADDR>() &= ~(1 << CtrlFlagsB::DATA_REG_EMPTY_INT_ENABLE);
+		auto ctrlStatRegB = getRegPtr<Registers::CTRL_STAT_REG_B_ADDR>();
+		*ctrlStatRegB = *ctrlStatRegB & ~(1 << CtrlFlagsB::DATA_REG_EMPTY_INT_ENABLE);
 	}
 
   private: