diff --git a/instrumentation/opentelemetry-instrumentation-asyncio/src/opentelemetry/instrumentation/asyncio/utils.py b/instrumentation/opentelemetry-instrumentation-asyncio/src/opentelemetry/instrumentation/asyncio/utils.py
index ac7b429056..eb457fb67a 100644
--- a/instrumentation/opentelemetry-instrumentation-asyncio/src/opentelemetry/instrumentation/asyncio/utils.py
+++ b/instrumentation/opentelemetry-instrumentation-asyncio/src/opentelemetry/instrumentation/asyncio/utils.py
@@ -21,7 +21,7 @@
 )
 
 
-def separate_coro_names_by_comma(coro_names: str) -> set:
+def separate_coro_names_by_comma(coro_names: str) -> Set[str]:
     """
     Function to separate the coroutines to be traced by comma
     """