diff --git a/mobile/src/main/java/be/mygod/librootkotlinx/RootServer.kt b/mobile/src/main/java/be/mygod/librootkotlinx/RootServer.kt
index 0c73c7a3..54151854 100644
--- a/mobile/src/main/java/be/mygod/librootkotlinx/RootServer.kt
+++ b/mobile/src/main/java/be/mygod/librootkotlinx/RootServer.kt
@@ -407,7 +407,10 @@ class RootServer {
                 mainInitialized.await()
                 CoroutineScope(Dispatchers.Main.immediate + job)
             }
-            val callbackWorker = Dispatchers.IO.limitedParallelism(1)
+            val callbackWorker by lazy {
+                mainInitialized.await()
+                Dispatchers.IO.limitedParallelism(1)
+            }
             // access to cancellables shall be wrapped in defaultWorker
             val cancellables = LongSparseArray<() -> Unit>()