diff --git a/public/tier1/strtools.h b/public/tier1/strtools.h
index e0f3981e..29358ada 100644
--- a/public/tier1/strtools.h
+++ b/public/tier1/strtools.h
@@ -217,10 +217,14 @@ typedef char *  va_list;
 
 #ifdef _WIN32
 #define CORRECT_PATH_SEPARATOR '\\'
+#define CORRECT_PATH_SEPARATOR_S "\\"
 #define INCORRECT_PATH_SEPARATOR '/'
+#define INCORRECT_PATH_SEPARATOR_S "/"
 #elif POSIX
 #define CORRECT_PATH_SEPARATOR '/'
+#define CORRECT_PATH_SEPARATOR_S "/"
 #define INCORRECT_PATH_SEPARATOR '\\'
+#define INCORRECT_PATH_SEPARATOR_S "\\"
 #endif
 
 int V_vsnprintf( char *pDest, int maxLen, const char *pFormat, va_list params );