diff --git a/workspace_tools/targets.py b/workspace_tools/targets.py
index 6fb1ca9c5a..097c5bbfc6 100755
--- a/workspace_tools/targets.py
+++ b/workspace_tools/targets.py
@@ -58,7 +58,7 @@ def cached(func):
 class Target:
     # Cumulative attributes can have values appended to them, so they
     # need to be computed differently than regular attributes
-    __cumulative_attributes = ['extra_labels', 'macros']
+    __cumulative_attributes = ['extra_labels', 'macros', 'features']
 
     # Utility function: traverse a dictionary and change all the strings in the dictionary to
     # ASCII from Unicode. Needed because the original mbed target definitions were written in
diff --git a/workspace_tools/toolchains/__init__.py b/workspace_tools/toolchains/__init__.py
index d122fb72d1..97c6f20f6b 100644
--- a/workspace_tools/toolchains/__init__.py
+++ b/workspace_tools/toolchains/__init__.py
@@ -298,6 +298,11 @@ class mbedToolchain:
 
             # Add target's symbols
             self.symbols += self.target.macros
+            # Add target's hardware
+            try :
+                self.symbols += ["DEVICE_" + feature + "=1" for feature in self.target.features]
+            except AttributeError :
+                pass
             # Add extra symbols passed via 'macros' parameter
             self.symbols += self.macros