diff --git a/docs/spec/protocol.rst b/docs/spec/protocol.rst
index 2803da0a..a7370b36 100644
--- a/docs/spec/protocol.rst
+++ b/docs/spec/protocol.rst
@@ -502,15 +502,18 @@ For example::
   from typing import Any, Protocol
 
   class ProtoA(Protocol):
-      def meth(self, x: int) -> int: ...
+      def meth(self, x: int) -> int:
+          ...
   class ProtoB(Protocol):
-      def meth(self, obj: Any, x: int) -> int: ...
+      def meth(self, obj: Any, x: int) -> int:
+          ...
 
   class C:
-      def meth(self, x: int) -> int: ...
+      def meth(self, x: int) -> int:
+          ...
 
-  a: ProtoA = C  # Type check error, signatures don't match!
-  b: ProtoB = C  # OK
+  a: ProtoA = C()  # OK
+  b: ProtoB = C()  # Error: signatures don't match
 
 .. _`protocol-newtype-aliases`: