diff --git a/tools/export/ds5_5.py b/tools/export/ds5_5.py
index b6b9d3efe1..71242efdd7 100644
--- a/tools/export/ds5_5.py
+++ b/tools/export/ds5_5.py
@@ -40,6 +40,8 @@ class DS5_5(Exporter):
         's_sources':'2'
     }
 
+    TOOLCHAIN = "ARM"
+
     def get_toolchain(self):
         return 'uARM' if (self.target in self.USING_MICROLIB) else 'ARM'