diff --git a/libraries/SD/src/SD.cpp b/libraries/SD/src/SD.cpp
index 65d32741c..3bf79aca2 100644
--- a/libraries/SD/src/SD.cpp
+++ b/libraries/SD/src/SD.cpp
@@ -450,7 +450,7 @@ File SDClass::open(const char *filepath, uint8_t mode) {
 
   // there is a special case for the Root directory since its a static dir
   if (parentdir.isRoot()) {
-    if ( ! file.open(SD.root, filepath, mode)) {
+    if ( ! file.open(root, filepath, mode)) {
       // failed to open the file :(
       return File();
     }