diff --git a/source/ps/CStr.h b/source/ps/CStr.h
index 9545d50f8a..cf9897453b 100755
--- a/source/ps/CStr.h
+++ b/source/ps/CStr.h
@@ -182,7 +182,7 @@ public:
 	TCHAR &operator[](long n);
 	TCHAR &operator[](unsigned long n);
 
-	inline const TCHAR *c_str()
+	inline const TCHAR *c_str() const
 	{	return m_String.c_str(); }
 	
 	size_t GetHashCode() const;