diff --git a/tools/toolchains/__init__.py b/tools/toolchains/__init__.py
index 845312b8df..e5c5682118 100644
--- a/tools/toolchains/__init__.py
+++ b/tools/toolchains/__init__.py
@@ -356,7 +356,7 @@ class mbedToolchain:
         bottom-up mode the directories in dirnames are generated before dirpath
         itself is generated.
         """
-        for root, dirs, files in walk(path):
+        for root, dirs, files in walk(path, followlinks=True):
             # Remove ignored directories
             for d in copy(dirs):
                 if d == '.hg':