diff --git a/components/gfx/font_context.rs b/components/gfx/font_context.rs
index 1011d40112b5..173f1815ed29 100644
--- a/components/gfx/font_context.rs
+++ b/components/gfx/font_context.rs
@@ -19,9 +19,8 @@ use platform::font_template::FontTemplateData;
 use smallvec::SmallVec;
 use std::cell::RefCell;
 use std::collections::HashMap;
-use std::collections::hash_state::DefaultState;
 use std::default::Default;
-use std::hash::{Hash, Hasher};
+use std::hash::{BuildHasherDefault, Hash, Hasher};
 use std::rc::Rc;
 use std::sync::Arc;
 use std::sync::atomic::{AtomicUsize, Ordering, ATOMIC_USIZE_INIT};
@@ -86,7 +85,7 @@ pub struct FontContext {
     paint_font_cache: Vec<PaintFontCacheEntry>,
 
     layout_font_group_cache:
-        HashMap<LayoutFontGroupCacheKey, Rc<FontGroup>, DefaultState<FnvHasher>>,
+        HashMap<LayoutFontGroupCacheKey, Rc<FontGroup>, BuildHasherDefault<FnvHasher>>,
 
     epoch: usize,
 }
@@ -100,7 +99,7 @@ impl FontContext {
             layout_font_cache: vec!(),
             fallback_font_cache: vec!(),
             paint_font_cache: vec!(),
-            layout_font_group_cache: HashMap::with_hash_state(Default::default()),
+            layout_font_group_cache: HashMap::with_hasher(Default::default()),
             epoch: 0,
         }
     }
diff --git a/components/gfx/lib.rs b/components/gfx/lib.rs
index 871e210f5413..dbf255a56b46 100644
--- a/components/gfx/lib.rs
+++ b/components/gfx/lib.rs
@@ -10,7 +10,6 @@
 #![feature(box_syntax)]
 #![feature(custom_attribute)]
 #![feature(custom_derive)]
-#![feature(hashmap_hasher)]
 #![feature(mpsc_select)]
 #![feature(plugin)]
 #![feature(str_char)]
diff --git a/components/layout/context.rs b/components/layout/context.rs
index 53bb036d09cd..ec2be6f2141a 100644
--- a/components/layout/context.rs
+++ b/components/layout/context.rs
@@ -20,7 +20,7 @@ use net_traits::image_cache_thread::{ImageCacheChan, ImageCacheThread, ImageResp
 use net_traits::image_cache_thread::{ImageOrMetadataAvailable, UsePlaceholder};
 use std::cell::{RefCell, RefMut};
 use std::collections::HashMap;
-use std::collections::hash_state::DefaultState;
+use std::hash::BuildHasherDefault;
 use std::rc::Rc;
 use std::sync::mpsc::Sender;
 use std::sync::{Arc, Mutex};
@@ -95,7 +95,7 @@ pub struct SharedLayoutContext {
     pub canvas_layers_sender: Mutex<Sender<(LayerId, IpcSender<CanvasMsg>)>>,
 
     /// The visible rects for each layer, as reported to us by the compositor.
-    pub visible_rects: Arc<HashMap<LayerId, Rect<Au>, DefaultState<FnvHasher>>>,
+    pub visible_rects: Arc<HashMap<LayerId, Rect<Au>, BuildHasherDefault<FnvHasher>>>,
 }
 
 pub struct LayoutContext<'a> {
diff --git a/components/layout/layout_thread.rs b/components/layout/layout_thread.rs
index 206bfe4c82d5..49875094b4fa 100644
--- a/components/layout/layout_thread.rs
+++ b/components/layout/layout_thread.rs
@@ -54,7 +54,7 @@ use serde_json;
 use std::borrow::ToOwned;
 use std::cell::RefCell;
 use std::collections::HashMap;
-use std::collections::hash_state::DefaultState;
+use std::hash::BuildHasherDefault;
 use std::ops::{Deref, DerefMut};
 use std::sync::atomic::{AtomicUsize, Ordering};
 use std::sync::mpsc::{channel, Sender, Receiver};
@@ -195,7 +195,7 @@ pub struct LayoutThread {
 
     /// The position and size of the visible rect for each layer. We do not build display lists
     /// for any areas more than `DISPLAY_PORT_SIZE_FACTOR` screens away from this area.
-    visible_rects: Arc<HashMap<LayerId, Rect<Au>, DefaultState<FnvHasher>>>,
+    visible_rects: Arc<HashMap<LayerId, Rect<Au>, BuildHasherDefault<FnvHasher>>>,
 
     /// The list of currently-running animations.
     running_animations: Arc<RwLock<HashMap<OpaqueNode, Vec<Animation>>>>,
@@ -430,7 +430,7 @@ impl LayoutThread {
             new_animations_receiver: new_animations_receiver,
             outstanding_web_fonts: outstanding_web_fonts_counter,
             root_flow: None,
-            visible_rects: Arc::new(HashMap::with_hash_state(Default::default())),
+            visible_rects: Arc::new(HashMap::with_hasher(Default::default())),
             running_animations: Arc::new(RwLock::new(HashMap::new())),
             expired_animations: Arc::new(RwLock::new(HashMap::new())),
             epoch: Epoch(0),
@@ -1099,7 +1099,7 @@ impl LayoutThread {
         // layers have moved more than `DISPLAY_PORT_THRESHOLD_SIZE_FACTOR` away from their last
         // positions.
         let mut must_regenerate_display_lists = false;
-        let mut old_visible_rects = HashMap::with_hash_state(Default::default());
+        let mut old_visible_rects = HashMap::with_hasher(Default::default());
         let inflation_amount =
             Size2D::new(self.viewport_size.width * DISPLAY_PORT_THRESHOLD_SIZE_FACTOR,
                         self.viewport_size.height * DISPLAY_PORT_THRESHOLD_SIZE_FACTOR);
diff --git a/components/layout/lib.rs b/components/layout/lib.rs
index cf0d2f18ea1e..4f46b0fe134e 100644
--- a/components/layout/lib.rs
+++ b/components/layout/lib.rs
@@ -6,7 +6,6 @@
 #![feature(box_syntax)]
 #![feature(cell_extras)]
 #![feature(custom_derive)]
-#![feature(hashmap_hasher)]
 #![feature(mpsc_select)]
 #![feature(nonzero)]
 #![feature(plugin)]
diff --git a/components/script/dom/eventtarget.rs b/components/script/dom/eventtarget.rs
index 48682ec22119..1ac0313d3c57 100644
--- a/components/script/dom/eventtarget.rs
+++ b/components/script/dom/eventtarget.rs
@@ -28,9 +28,9 @@ use js::rust::{AutoObjectVectorWrapper, CompileOptionsWrapper};
 use libc::{c_char, size_t};
 use std::collections::HashMap;
 use std::collections::hash_map::Entry::{Occupied, Vacant};
-use std::collections::hash_state::DefaultState;
 use std::default::Default;
 use std::ffi::CString;
+use std::hash::BuildHasherDefault;
 use std::rc::Rc;
 use std::{intrinsics, ptr};
 use string_cache::Atom;
@@ -161,7 +161,7 @@ pub struct EventListenerEntry {
 #[dom_struct]
 pub struct EventTarget {
     reflector_: Reflector,
-    handlers: DOMRefCell<HashMap<Atom, Vec<EventListenerEntry>, DefaultState<FnvHasher>>>,
+    handlers: DOMRefCell<HashMap<Atom, Vec<EventListenerEntry>, BuildHasherDefault<FnvHasher>>>,
 }
 
 impl EventTarget {
diff --git a/components/script/lib.rs b/components/script/lib.rs
index 6365c03c5b79..d9bdd7425597 100644
--- a/components/script/lib.rs
+++ b/components/script/lib.rs
@@ -12,7 +12,6 @@
 #![feature(custom_attribute)]
 #![feature(custom_derive)]
 #![feature(fnbox)]
-#![feature(hashmap_hasher)]
 #![feature(mpsc_select)]
 #![feature(nonzero)]
 #![feature(on_unimplemented)]
diff --git a/components/util/cache.rs b/components/util/cache.rs
index deb87405d1f0..7b8d7bfb1a06 100644
--- a/components/util/cache.rs
+++ b/components/util/cache.rs
@@ -6,9 +6,8 @@ use rand;
 use rand::Rng;
 use std::collections::HashMap;
 use std::collections::hash_map::Entry::{Occupied, Vacant};
-use std::collections::hash_state::DefaultState;
 use std::default::Default;
-use std::hash::{Hash, Hasher, SipHasher};
+use std::hash::{BuildHasherDefault, Hash, Hasher, SipHasher};
 use std::slice::Iter;
 
 
@@ -17,7 +16,7 @@ pub struct HashCache<K, V>
     where K: Clone + PartialEq + Eq + Hash,
           V: Clone,
 {
-    entries: HashMap<K, V, DefaultState<SipHasher>>,
+    entries: HashMap<K, V, BuildHasherDefault<SipHasher>>,
 }
 
 impl<K, V> HashCache<K, V>
@@ -26,7 +25,7 @@ impl<K, V> HashCache<K, V>
 {
     pub fn new() -> HashCache<K, V> {
         HashCache {
-          entries: HashMap::with_hash_state(<DefaultState<SipHasher> as Default>::default()),
+          entries: HashMap::with_hasher(Default::default()),
         }
     }
 
diff --git a/components/util/lib.rs b/components/util/lib.rs
index 660945d4c1a8..01e467272384 100644
--- a/components/util/lib.rs
+++ b/components/util/lib.rs
@@ -8,7 +8,6 @@
 #![feature(custom_derive)]
 #![cfg_attr(feature = "non-geckolib", feature(decode_utf16))]
 #![feature(fnbox)]
-#![feature(hashmap_hasher)]
 #![feature(heap_api)]
 #![feature(oom)]
 #![feature(optin_builtin_traits)]