diff --git a/src/fuse_create.cpp b/src/fuse_create.cpp
index 2fac219f..024f0437 100644
--- a/src/fuse_create.cpp
+++ b/src/fuse_create.cpp
@@ -65,6 +65,13 @@ namespace l
     return ((flags_ & O_ACCMODE) == O_WRONLY);
   }
 
+  static
+  bool
+  rdwr(const int flags_)
+  {
+    return ((flags_ & O_ACCMODE) == O_RDWR);
+  }
+
   static
   bool
   calculate_flush(FlushOnClose const flushonclose_,