diff --git a/doc/go_spec.html b/doc/go_spec.html
index b5096322a5..f4f2f56a0d 100644
--- a/doc/go_spec.html
+++ b/doc/go_spec.html
@@ -2458,7 +2458,7 @@ More precisely, if T is not an interface type, x.(T) a
that the dynamic type of x is identical to the type T
(§Type identity and compatibility).
If T is an interface type, x.(T) asserts that the dynamic type
-of T implements the interface T (§Interface types).
+of x implements the interface T (§Interface types).
If the type assertion holds, the value of the expression is the value