diff --git a/comphelper/source/property/property.cxx b/comphelper/source/property/property.cxx
index 49a7a108f09a..16edc8203255 100644
--- a/comphelper/source/property/property.cxx
+++ b/comphelper/source/property/property.cxx
@@ -99,7 +99,7 @@ void copyProperties(const Reference<XPropertySet>& _rxSource,
                 }
                 else
                 {
-                    aBuffer.append( OUString::createFromAscii(typeid( *_rxDest ).name()) );
+                    aBuffer.appendAscii( typeid( *_rxDest ).name() );
                 }
                 aBuffer.append( "' implementation).\n" );
 
diff --git a/forms/source/xforms/convert.cxx b/forms/source/xforms/convert.cxx
index d3fbb0718db6..420dfd32fe70 100644
--- a/forms/source/xforms/convert.cxx
+++ b/forms/source/xforms/convert.cxx
@@ -131,7 +131,7 @@ namespace
             ostr.fill('0');
             ostr.width(9);
             ostr << rTime.NanoSeconds;
-            sInfo.append(OUString::createFromAscii(ostr.str().c_str()));
+            sInfo.appendAscii(ostr.str().c_str());
         }
 
         return sInfo.makeStringAndClear();
diff --git a/sax/source/tools/converter.cxx b/sax/source/tools/converter.cxx
index ef043abd4d7d..85f228955367 100644
--- a/sax/source/tools/converter.cxx
+++ b/sax/source/tools/converter.cxx
@@ -1129,7 +1129,7 @@ void Converter::convertDuration(OUStringBuffer& rBuffer,
                 ostr.fill('0');
                 ostr.width(9);
                 ostr << rDuration.NanoSeconds;
-                rBuffer.append(OUString::createFromAscii(ostr.str().c_str()));
+                rBuffer.appendAscii(ostr.str().c_str());
             }
             rBuffer.append('S');
         }
@@ -1510,7 +1510,7 @@ static void convertTime(
         ostr.fill('0');
         ostr.width(9);
         ostr << i_rDateTime.NanoSeconds;
-        i_rBuffer.append(OUString::createFromAscii(ostr.str().c_str()));
+        i_rBuffer.appendAscii(ostr.str().c_str());
     }
 }
 
diff --git a/unotools/source/misc/datetime.cxx b/unotools/source/misc/datetime.cxx
index c620307a9629..f95f39f92112 100644
--- a/unotools/source/misc/datetime.cxx
+++ b/unotools/source/misc/datetime.cxx
@@ -299,7 +299,7 @@ OUString toISO8601(const css::util::DateTime& rDateTime)
             ostr.fill('0');
             ostr.width(9);
             ostr << rDateTime.NanoSeconds;
-            rBuffer.append(OUString::createFromAscii(ostr.str().c_str()));
+            rBuffer.appendAscii(ostr.str().c_str());
         }
     }
     return rBuffer.makeStringAndClear();
diff --git a/xmlsecurity/source/xmlsec/nss/securityenvironment_nssimpl.cxx b/xmlsecurity/source/xmlsec/nss/securityenvironment_nssimpl.cxx
index b12a3356d18c..aa0b0c2d4612 100644
--- a/xmlsecurity/source/xmlsec/nss/securityenvironment_nssimpl.cxx
+++ b/xmlsecurity/source/xmlsec/nss/securityenvironment_nssimpl.cxx
@@ -156,7 +156,7 @@ OUString SecurityEnvironment_NssImpl::getSecurityEnvironmentInformation()
     OUStringBuffer buff;
     for (auto& slot : m_Slots)
     {
-        buff.append(OUString::createFromAscii(PK11_GetTokenName(slot)));
+        buff.appendAscii(PK11_GetTokenName(slot));
         buff.append("\n");
     }
     return buff.makeStringAndClear();