diff --git a/chart2/source/view/inc/PropertyMapper.hxx b/chart2/source/view/inc/PropertyMapper.hxx
index 2039ebdde185..54699b95017a 100644
--- a/chart2/source/view/inc/PropertyMapper.hxx
+++ b/chart2/source/view/inc/PropertyMapper.hxx
@@ -20,7 +20,7 @@
 
 #include <sal/config.h>
 
-#include <map>
+#include <unordered_map>
 
 #include <com/sun/star/uno/Sequence.h>
 #include <com/sun/star/uno/Reference.h>
@@ -30,8 +30,8 @@ namespace com::sun::star::beans { class XPropertySet; }
 namespace chart
 {
 
-typedef std::map< OUString, OUString >                              tPropertyNameMap;
-typedef std::map< OUString, css::uno::Any >            tPropertyNameValueMap;
+typedef std::unordered_map<OUString, OUString> tPropertyNameMap;
+typedef std::unordered_map<OUString, css::uno::Any> tPropertyNameValueMap;
 typedef css::uno::Sequence< OUString >                   tNameSequence;
 typedef css::uno::Sequence< css::uno::Any > tAnySequence;