diff --git a/keycodes.h b/keycodes.h
index 8ceabdb..bc11f47 100644
--- a/keycodes.h
+++ b/keycodes.h
@@ -271,10 +271,10 @@ protected:
 	void setCPTable(const uint16 *table, uint16 size, uint16 offset = 0x80);
 
 public:
-	uint8 GetWinCode(uint16 code) {
+	uint8 getWinCode(uint16 code) const {
 		return _winCodes[code];
 	};
-	uint16 GetScummCode(uint8 code) {
+	uint16 getScummCode(uint8 code) const {
 		return _scummCodes[code];
 	};
 
diff --git a/proc.cpp b/proc.cpp
index 2528017..ebc1585 100644
--- a/proc.cpp
+++ b/proc.cpp
@@ -33,7 +33,7 @@ void SystemProc::processMessage(const Common::Event &ev) {
 
 		_ascii = ev.kbd.ascii;
 
-		winKey = _codesConverter->GetWinCode(ev.kbd.keycode);
+		winKey = _codesConverter->getWinCode(ev.kbd.keycode);
 
 		if (winKey == KeyCodes::WIN_BACK ||
 			winKey == KeyCodes::WIN_RETURN ||