diff --git a/src/librustc_typeck/check/mod.rs b/src/librustc_typeck/check/mod.rs
index a95b3f4a973bb..22fa20bbef936 100644
--- a/src/librustc_typeck/check/mod.rs
+++ b/src/librustc_typeck/check/mod.rs
@@ -114,7 +114,6 @@ use syntax::abi::Abi;
 use syntax::ast;
 use syntax::attr;
 use syntax::codemap::{self, original_sp, Spanned};
-use syntax::feature_gate::{GateIssue, emit_feature_err};
 use syntax::parse::token::{self, InternedString, keywords};
 use syntax::ptr::P;
 use syntax::util::lev_distance::find_best_match_for_name;
@@ -3260,16 +3259,6 @@ impl<'a, 'gcx, 'tcx> FnCtxt<'a, 'gcx, 'tcx> {
             }
             Def::Struct(..) | Def::Union(..) | Def::TyAlias(..) |
             Def::AssociatedTy(..) | Def::SelfTy(..) => {
-                match def {
-                    Def::AssociatedTy(..) | Def::SelfTy(..)
-                            if !self.tcx.sess.features.borrow().more_struct_aliases => {
-                        emit_feature_err(&self.tcx.sess.parse_sess,
-                                         "more_struct_aliases", path.span, GateIssue::Language,
-                                         "`Self` and associated types in struct \
-                                          expressions and patterns are unstable");
-                    }
-                    _ => {}
-                }
                 match ty.sty {
                     ty::TyAdt(adt, substs) if !adt.is_enum() => {
                         Some((adt.struct_variant(), adt.did, substs))
diff --git a/src/libsyntax/feature_gate.rs b/src/libsyntax/feature_gate.rs
index 9116b392f1784..8a5f4d9e3a59e 100644
--- a/src/libsyntax/feature_gate.rs
+++ b/src/libsyntax/feature_gate.rs
@@ -308,9 +308,6 @@ declare_features! (
 
     // The #![windows_subsystem] attribute
     (active, windows_subsystem, "1.14.0", Some(37499)),
-
-    // Allows using `Self` and associated types in struct expressions and patterns.
-    (active, more_struct_aliases, "1.14.0", Some(37544)),
 );
 
 declare_features! (
@@ -357,6 +354,8 @@ declare_features! (
     (accepted, question_mark, "1.13.0", Some(31436)),
     // Allows `..` in tuple (struct) patterns
     (accepted, dotdot_in_tuple_patterns, "1.14.0", Some(33627)),
+    // Allows using `Self` and associated types in struct expressions and patterns.
+    (accepted, more_struct_aliases, "1.14.0", Some(37544)),
 );
 // (changing above list without updating src/doc/reference.md makes @cmr sad)
 
diff --git a/src/test/compile-fail/struct-path-associated-type.rs b/src/test/compile-fail/struct-path-associated-type.rs
index ecaf269fcb1ae..660ac44ce0b53 100644
--- a/src/test/compile-fail/struct-path-associated-type.rs
+++ b/src/test/compile-fail/struct-path-associated-type.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(more_struct_aliases)]
-
 struct S;
 
 trait Tr {
diff --git a/src/test/compile-fail/struct-path-self-feature-gate.rs b/src/test/compile-fail/struct-path-self-feature-gate.rs
deleted file mode 100644
index a2050182a7e30..0000000000000
--- a/src/test/compile-fail/struct-path-self-feature-gate.rs
+++ /dev/null
@@ -1,29 +0,0 @@
-// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-struct S;
-
-trait Tr {
-    type A;
-}
-
-fn f<T: Tr<A = S>>() {
-    let _ = T::A {};
-    //~^ ERROR `Self` and associated types in struct expressions and patterns are unstable
-}
-
-impl S {
-    fn f() {
-        let _ = Self {};
-        //~^ ERROR `Self` and associated types in struct expressions and patterns are unstable
-    }
-}
-
-fn main() {}
diff --git a/src/test/compile-fail/struct-path-self-type-mismatch.rs b/src/test/compile-fail/struct-path-self-type-mismatch.rs
index 8352bd6751f50..f694e7d277c7f 100644
--- a/src/test/compile-fail/struct-path-self-type-mismatch.rs
+++ b/src/test/compile-fail/struct-path-self-type-mismatch.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(more_struct_aliases)]
-
 struct Foo<A> { inner: A }
 
 trait Bar { fn bar(); }
diff --git a/src/test/compile-fail/struct-path-self.rs b/src/test/compile-fail/struct-path-self.rs
index aeac199227b75..067d6ac22dc6f 100644
--- a/src/test/compile-fail/struct-path-self.rs
+++ b/src/test/compile-fail/struct-path-self.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(more_struct_aliases)]
-
 struct S;
 
 trait Tr {
diff --git a/src/test/run-pass/struct-path-associated-type.rs b/src/test/run-pass/struct-path-associated-type.rs
index 292761dfd005f..b033ed5c80210 100644
--- a/src/test/run-pass/struct-path-associated-type.rs
+++ b/src/test/run-pass/struct-path-associated-type.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(more_struct_aliases)]
-
 struct S<T, U = u16> {
     a: T,
     b: U,
diff --git a/src/test/run-pass/struct-path-self.rs b/src/test/run-pass/struct-path-self.rs
index b569ab62c1bfa..c7a282c2a2fa0 100644
--- a/src/test/run-pass/struct-path-self.rs
+++ b/src/test/run-pass/struct-path-self.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(more_struct_aliases)]
-
 use std::ops::Add;
 
 struct S<T, U = u16> {