diff --git a/mbed_app.json b/mbed_app.json
index 6e884d8..cc02d43 100644
--- a/mbed_app.json
+++ b/mbed_app.json
@@ -1,7 +1,8 @@
 {
     "target_overrides": {
         "*": {
-            "platform.stdio-convert-newlines": true
+            "platform.stdio-convert-newlines": true,
+            "platform.callback-nontrivial": true
         }
     }
 }