diff --git a/src/common/string.cpp b/src/common/string.cpp
index 7ac3f254a2..29d51e71b8 100644
--- a/src/common/string.cpp
+++ b/src/common/string.cpp
@@ -1017,7 +1017,7 @@ bool wxString::IsAscii() const
 {
   const wxChar *s = (const wxChar*) *this;
   while(*s){
-    if(!wxIsascii(*s)) return(FALSE);
+    if(!isascii(*s)) return(FALSE);
     s++;
   }
   return(TRUE);
diff --git a/src/common/valtext.cpp b/src/common/valtext.cpp
index 7ca1758c3d..16dadf77a5 100644
--- a/src/common/valtext.cpp
+++ b/src/common/valtext.cpp
@@ -246,7 +246,7 @@ void wxTextValidator::OnChar(wxKeyEvent& event)
              (
               ((m_validatorStyle & wxFILTER_INCLUDE_CHAR_LIST) && !IsInCharIncludeList(wxString((char) keyCode, 1))) ||
               ((m_validatorStyle & wxFILTER_EXCLUDE_CHAR_LIST) && !IsNotInCharExcludeList(wxString((char) keyCode, 1))) ||
-              ((m_validatorStyle & wxFILTER_ASCII) && !wxIsascii(keyCode)) ||
+              ((m_validatorStyle & wxFILTER_ASCII) && !isascii(keyCode)) ||
               ((m_validatorStyle & wxFILTER_ALPHA) && !wxIsalpha(keyCode)) ||
               ((m_validatorStyle & wxFILTER_ALPHANUMERIC) && !wxIsalnum(keyCode)) ||
               ((m_validatorStyle & wxFILTER_NUMERIC) && !wxIsdigit(keyCode)