diff --git a/unotools/source/i18n/charclass.cxx b/unotools/source/i18n/charclass.cxx
index cd8d036ab601..35f327238609 100644
--- a/unotools/source/i18n/charclass.cxx
+++ b/unotools/source/i18n/charclass.cxx
@@ -81,8 +81,8 @@ sal_Bool CharClass::isAsciiNumeric( const String& rStr )
 {
     if ( !rStr.Len() )
         return sal_False;
-    register const sal_Unicode* p = rStr.GetBuffer();
-    register const sal_Unicode* const pStop = p + rStr.Len();
+    const sal_Unicode* p = rStr.GetBuffer();
+    const sal_Unicode* const pStop = p + rStr.Len();
     do
     {
         if ( !isAsciiDigit( *p ) )
@@ -97,8 +97,8 @@ sal_Bool CharClass::isAsciiAlpha( const String& rStr )
 {
     if ( !rStr.Len() )
         return sal_False;
-    register const sal_Unicode* p = rStr.GetBuffer();
-    register const sal_Unicode* const pStop = p + rStr.Len();
+    const sal_Unicode* p = rStr.GetBuffer();
+    const sal_Unicode* const pStop = p + rStr.Len();
     do
     {
         if ( !isAsciiAlpha( *p ) )