diff --git a/sources/CPU/CPU.hpp b/sources/CPU/CPU.hpp
index ddd184a..23d1f83 100644
--- a/sources/CPU/CPU.hpp
+++ b/sources/CPU/CPU.hpp
@@ -393,7 +393,6 @@ namespace ComSquare::CPU
 		//! @brief Return from Interrupt - Used to return from a interrupt handler.
 		void RTI();
 		//! @brief Add with carry - Adds operand to the Accumulator; adds an additional 1 if carry is set.
-		//! @return The number of extra cycles that this operation took.
 		void ADC(uint24_t valueAddr);
 		//! @brief Store the accumulator to memory.
 		void STA(uint24_t addr);
@@ -461,6 +460,8 @@ namespace ComSquare::CPU
 		void XCE();
 		//! @brief And accumulator with memory.
 		void AND(uint24_t valueAddr);
+		//! @brief Subtract with Borrow from Accumulator.
+		void SBC(uint24_t valueAddr);
 	public:
 		explicit CPU(std::shared_ptr<Memory::MemoryBus> bus, Cartridge::Header &cartridgeHeader);
 		CPU(const CPU &) = default;
diff --git a/sources/CPU/Instructions/MathematicalOperations.cpp b/sources/CPU/Instructions/MathematicalOperations.cpp
index 83455f8..8300f69 100644
--- a/sources/CPU/Instructions/MathematicalOperations.cpp
+++ b/sources/CPU/Instructions/MathematicalOperations.cpp
@@ -26,4 +26,9 @@ namespace ComSquare::CPU
 		this->_registers.p.z = this->_registers.a == 0;
 		this->_registers.p.n = this->_registers.a & negativeMask;
 	}
+
+	void CPU::SBC(uint24_t valueAddr)
+	{
+
+	}
 }
\ No newline at end of file