diff --git a/aiobotocore/session.py b/aiobotocore/session.py
index 07a1a29e..0f029f67 100644
--- a/aiobotocore/session.py
+++ b/aiobotocore/session.py
@@ -136,9 +136,9 @@ async def get_service_data(self, service_name, api_version=None):
             api_version=api_version
         )
         service_id = EVENT_ALIASES.get(service_name, service_name)
-        self._events.emit('service-data-loaded.%s' % service_id,
-                          service_data=service_data,
-                          service_name=service_name, session=self)
+        await self._events.emit('service-data-loaded.%s' % service_id,
+                                service_data=service_data,
+                                service_name=service_name, session=self)
         return service_data
 
     async def get_available_regions(self, service_name, partition_name='aws',
diff --git a/tests/test_session.py b/tests/test_session.py
new file mode 100644
index 00000000..84e536b2
--- /dev/null
+++ b/tests/test_session.py
@@ -0,0 +1,16 @@
+import pytest
+
+
+@pytest.mark.moto
+@pytest.mark.asyncio
+async def test_get_service_data(session):
+    handler_called = False
+
+    def handler(**kwargs):
+        nonlocal handler_called
+        handler_called = True
+
+    session.register('service-data-loaded.s3', handler)
+    await session.get_service_data('s3')
+
+    assert handler_called