diff --git a/source/MicroBit.cpp b/source/MicroBit.cpp
index 62859f6..7d03dff 100644
--- a/source/MicroBit.cpp
+++ b/source/MicroBit.cpp
@@ -97,7 +97,7 @@ void MicroBit::init()
 #endif
 
     // Bring up fiber scheduler.
-    scheduler_init(&messageBus);
+    scheduler_init(messageBus);
 
     // Seed our random number generator
     seedRandom();