--- a/src/in_xsf_framework/RegExValidator.cpp
+++ b/src/in_xsf_framework/RegExValidator.cpp
@@ -2,7 +2,7 @@
 #include <wx/string.h>
 #include "RegExValidator.h"
 
-RegExValidator::RegExValidator(wxString regExpString, wxString *valPtr, int regExpFlags) : wxTextValidator(wxFILTER_EMPTY, valPtr), regEx(regExpString, regExpFlags), regExString(regExpString), regExFlags(regExpFlags)
+RegExValidator::RegExValidator(const wxString &regExpString, wxString *valPtr, int regExpFlags) : wxTextValidator(wxFILTER_EMPTY, valPtr), regEx(regExpString, regExpFlags), regExString(regExpString), regExFlags(regExpFlags)
 {
 }
 

--- a/src/in_xsf_framework/RegExValidator.h
+++ b/src/in_xsf_framework/RegExValidator.h
@@ -1,9 +1,10 @@
 #pragma once
 
-#include <wx/object.h>
 #include <wx/regex.h>
 #include <wx/string.h>
 #include <wx/valtext.h>
+
+class wxObject;
 
 class RegExValidator : public wxTextValidator
 {
@@ -12,7 +13,7 @@
 	wxString regExString;
 	int regExFlags;
 public:
-	RegExValidator(wxString regExpString, wxString *valPtr = nullptr, int regExpFlags = wxRE_DEFAULT);
+	RegExValidator(const wxString &regExpString, wxString *valPtr = nullptr, int regExpFlags = wxRE_DEFAULT);
 	wxObject *Clone() const override;
 	wxString IsValid(const wxString &str) const override;
 };