diff --git a/src/base/base_strings.h b/src/base/base_strings.h
index 23be121a..dbd50e1d 100644
--- a/src/base/base_strings.h
+++ b/src/base/base_strings.h
@@ -86,6 +86,7 @@ enum
 
 typedef enum PathStyle
 {
+  PathStyle_Null,
   PathStyle_Relative,
   PathStyle_WindowsAbsolute,
   PathStyle_UnixAbsolute,