diff --git a/starmath/source/view.cxx b/starmath/source/view.cxx
index 1c4ca5401969..c5ffc3983223 100644
--- a/starmath/source/view.cxx
+++ b/starmath/source/view.cxx
@@ -1669,7 +1669,7 @@ void SmViewShell::Execute(SfxRequest& rReq)
                         SfxMedium* pClipboardMedium = new SfxMedium();
                         pClipboardMedium->GetItemSet(); //generate initial itemset, not sure if necessary
                         const SfxFilter* pMathFilter =
-                            SfxFilter::GetFilterByName(OUString::createFromAscii(MATHML_XML));
+                            SfxFilter::GetFilterByName(MATHML_XML);
                         pClipboardMedium->SetFilter(pMathFilter);
                         pClipboardMedium->setStreamToLoadFrom(xStrm, true /*bIsReadOnly*/);
                         InsertFrom(*pClipboardMedium);
@@ -1688,14 +1688,14 @@ void SmViewShell::Execute(SfxRequest& rReq)
                             SfxMedium* pClipboardMedium = new SfxMedium();
                             pClipboardMedium->GetItemSet(); //generates initial itemset, not sure if necessary
                             const SfxFilter* pMathFilter =
-                                SfxFilter::GetFilterByName(OUString::createFromAscii(MATHML_XML));
+                                SfxFilter::GetFilterByName(MATHML_XML);
                             pClipboardMedium->SetFilter(pMathFilter);
 
                             SvMemoryStream * pStrm;
                             // The text to be imported might asserts encoding like 'encoding="utf-8"' but FORMAT_STRING is UTF-16.
                             // Force encoding to UTF-16, if encoding exists.
                             bool bForceUTF16 = false;
-                            sal_Int32 nPosL = aString.indexOf( OUString::createFromAscii("encoding=\""));
+                            sal_Int32 nPosL = aString.indexOf("encoding=\"");
                             sal_Int32 nPosU = -1;
                             if ( nPosL >= 0 && nPosL +10 < aString.getLength() )
                             {
@@ -1708,12 +1708,12 @@ void SmViewShell::Execute(SfxRequest& rReq)
                             }
                             if ( bForceUTF16 )
                             {
-                                OUString aNewString = aString.replaceAt( nPosL,nPosU-nPosL,OUString::createFromAscii("UTF-16"));
-                                pStrm = new SvMemoryStream( (void*)aNewString.getStr(), aNewString.getLength() * sizeof(sal_Unicode), StreamMode::READ);
+                                OUString aNewString = aString.replaceAt( nPosL,nPosU-nPosL,"UTF-16");
+                                pStrm = new SvMemoryStream( const_cast<sal_Unicode *>(aNewString.getStr()), aNewString.getLength() * sizeof(sal_Unicode), StreamMode::READ);
                             }
                             else
                             {
-                                pStrm = new SvMemoryStream( (void*)aString.getStr(), aString.getLength() * sizeof(sal_Unicode), StreamMode::READ);
+                                pStrm = new SvMemoryStream( const_cast<sal_Unicode *>(aString.getStr()), aString.getLength() * sizeof(sal_Unicode), StreamMode::READ);
                             }
                             uno::Reference<io::XInputStream> xStrm2( new ::utl::OInputStreamWrapper(*pStrm) );
                             pClipboardMedium->setStreamToLoadFrom(xStrm2, true /*bIsReadOnly*/);