diff --git a/include/strings.h b/include/strings.h
index b96abf3e1..34e97f238 100755
--- a/include/strings.h
+++ b/include/strings.h
@@ -609,6 +609,10 @@ public:
   void add(long n, int pos = -1);
   // @cmember Aggiunge un intero
   void add(int n, int pos = -1);
+  // @cmember Aggiunge un reale
+  void add(const real r, int pos = -1);
+  // @cmember Aggiunge un reale
+  void add(const TDate d, int pos = -1);
   // @cmember Inserisce una stringa
   void insert_at(const char* s, int n);
   // @cmember Toglie la stringa di posizione pos
@@ -722,6 +726,11 @@ TToken_string& get_tmp_string(int len = -1);
 const TToken_string& empty_string();
 #define EMPTY_STRING empty_string()
 
-const char SLASH = '\\';
+const char SLASH =
+#if XVT_OS == XVT_OS_WIN32
+'\\';
+#else                   
+'/';
+#endif
 
 #endif