Index: /Include/basic/function.sbp
===================================================================
--- /Include/basic/function.sbp	(revision 163)
+++ /Include/basic/function.sbp	(revision 164)
@@ -1101,5 +1101,5 @@
 End Function
 
-Function _System_ASCII_IsLower(c As Char) As Boolean
+Function _System_ASCII_IsLower(c As SByte) As Boolean
 	Return _System_ASCII_IsLower(c As Byte As WCHAR)
 End Function
@@ -1117,5 +1117,5 @@
 End Function
 
-Function _System_ASCII_ToUpper(c As Char) As Char
+Function _System_ASCII_ToUpper(c As WCHAR) As WCHAR
 	If _System_ASCII_IsLower(c) Then
 		Return c And (Not &h20)