diff --git a/reactos/boot/freeldr/freeldr/arch/i386/xboxi2c.c b/reactos/boot/freeldr/freeldr/arch/i386/xboxi2c.c
index 02d0458fa59..a8e17cc1cfa 100644
--- a/reactos/boot/freeldr/freeldr/arch/i386/xboxi2c.c
+++ b/reactos/boot/freeldr/freeldr/arch/i386/xboxi2c.c
@@ -196,8 +196,8 @@ I2cSetFrontpanelLed(UCHAR b)
 // r = Red, g = Green, o = Orange, x = Off
 // This func is taken from cromwell, all credits goes for them
 void
-XboxSetLED(UCHAR *pattern) {
-	char *x = pattern;
+XboxSetLED(PCSTR pattern) {
+	const char *x = pattern;
 	int r, g;
 	
 	if(strlen(pattern) == 4) {
diff --git a/reactos/boot/freeldr/freeldr/include/arch/i386/machxbox.h b/reactos/boot/freeldr/freeldr/include/arch/i386/machxbox.h
index e3c6817d042..fef0ca58080 100644
--- a/reactos/boot/freeldr/freeldr/include/arch/i386/machxbox.h
+++ b/reactos/boot/freeldr/freeldr/include/arch/i386/machxbox.h
@@ -60,7 +60,7 @@ VOID XboxRTCGetCurrentDateTime(PULONG Year, PULONG Month, PULONG Day, PULONG Hou
 
 VOID XboxHwDetect(VOID);
 
-VOID XboxSetLED(UCHAR *Pattern);
+VOID XboxSetLED(PCSTR Pattern);
 
 
 #endif /* __I386_HWXBOX_H_ */