diff --git a/include/wx/dynarray.h b/include/wx/dynarray.h
index 67dc5e6f5e..03cb8c6c1f 100644
--- a/include/wx/dynarray.h
+++ b/include/wx/dynarray.h
@@ -255,6 +255,9 @@ public:
         Add(item);
     }
 
+protected:
+    SCMPFUNC GetCompareFunction() const wxNOEXCEPT { return m_fnCompare; }
+
 private:
     SCMPFUNC m_fnCompare;
 };
diff --git a/src/common/arrstr.cpp b/src/common/arrstr.cpp
index 3aac42f67d..3611bc4276 100644
--- a/src/common/arrstr.cpp
+++ b/src/common/arrstr.cpp
@@ -198,15 +198,16 @@ int wxSortedArrayString::Index(const wxString& str,
     wxASSERT_MSG( bCase && !bFromEnd,
                   "search parameters ignored for sorted array" );
 
+    SCMPFUNC function = GetCompareFunction();
     wxSortedArrayString::const_iterator
         it = std::lower_bound(begin(), end(), str,
 #if __cplusplus >= 201103L || wxCHECK_VISUALC_VERSION(14)
-                              [](const wxString& s1, const wxString& s2)
+                              [function](const wxString& s1, const wxString& s2)
                               {
-                                  return s1 < s2;
+                                  return function(s1, s2) < 0;
                               }
 #else // C++98 version
-                              wxStringCompare(wxStringCmp())
+                              wxStringCompare(function)
 #endif // C++11/C++98
                               );