diff --git a/sources/PPU/PPU.cpp b/sources/PPU/PPU.cpp
index c8791bd..8e788c8 100644
--- a/sources/PPU/PPU.cpp
+++ b/sources/PPU/PPU.cpp
@@ -62,9 +62,13 @@ namespace ComSquare::PPU
 		case 0x0C:
 			this->bg34nba.raw = data;
 			break;
-		//TODO adding the rest of the registers. ooof !
+		//TODO adding the rest of the registers. oaf !
 		default:
 			throw InvalidAddress("PPU Internal Registers write", addr);
 		}
 	}
+
+	void PPU::update(int cycles) {
+
+	}
 }
\ No newline at end of file
diff --git a/sources/PPU/PPU.hpp b/sources/PPU/PPU.hpp
index 7b7f24c..190feaf 100644
--- a/sources/PPU/PPU.hpp
+++ b/sources/PPU/PPU.hpp
@@ -390,6 +390,9 @@ namespace ComSquare::PPU
 		//! @param data The new data to write.
 		//! @throw This function should thrown an InvalidAddress for address that are not mapped to the component.
 		void write(uint24_t addr, uint8_t data) override;
+		//! @brief Update the PPU of n cycles.
+		//! @param The number of cycles to update.
+		void update(int cycles);
 	};
 }
 #endif //COMSQUARE_PPU_HPP