diff --git a/CHANGES/3775.doc b/CHANGES/3775.doc
new file mode 100644
index 00000000000..8b3c48693d1
--- /dev/null
+++ b/CHANGES/3775.doc
@@ -0,0 +1 @@
+use ``if __name__ == '__main__':`` in server examples.
diff --git a/README.rst b/README.rst
index 785ab5cd5ee..28ea02dec5b 100644
--- a/README.rst
+++ b/README.rst
@@ -106,7 +106,8 @@ An example using a simple server:
                     web.get('/echo', wshandle),
                     web.get('/{name}', handle)])
 
-    web.run_app(app)
+    if __name__ == '__main__':
+        web.run_app(app)
 
 
 Documentation
diff --git a/docs/index.rst b/docs/index.rst
index f83f96e894b..aa20a78fe99 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -76,8 +76,9 @@ Client example::
             html = await fetch(session, 'http://python.org')
             print(html)
 
-    loop = asyncio.get_event_loop()
-    loop.run_until_complete(main())
+    if __name__ == '__main__':
+        loop = asyncio.get_event_loop()
+        loop.run_until_complete(main())
 
 Server example::
 
@@ -92,7 +93,8 @@ Server example::
     app.add_routes([web.get('/', handle),
                     web.get('/{name}', handle)])
 
-    web.run_app(app)
+    if __name__ == '__main__':
+        web.run_app(app)
 
 
 For more information please visit :ref:`aiohttp-client` and