diff --git a/ably/decorator/sync.py b/ably/decorator/sync.py
index 2db3e054..b79c55d6 100644
--- a/ably/decorator/sync.py
+++ b/ably/decorator/sync.py
@@ -34,12 +34,9 @@ def wrapper(*args, **kwargs):
         except:
             pass
         ably_eventloop = get_custom_event_loop()
-        res = fn(*args, **kwargs)
-        if asyncio.iscoroutine(res):
-            future = asyncio.run_coroutine_threadsafe(res, ably_eventloop)
-            if caller_eventloop is not None and caller_eventloop.is_running():
-                return asyncio.wrap_future(future)
-            return future.result()
-        return res
+        future = asyncio.run_coroutine_threadsafe(fn(*args, **kwargs), ably_eventloop)
+        if caller_eventloop is not None and caller_eventloop.is_running():
+            return asyncio.wrap_future(future)
+        return future.result()
 
     return wrapper