diff --git a/src/lib.rs b/src/lib.rs
index c2bcfd56939..4dae0c085a1 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -899,13 +899,13 @@ pub mod __wbg_shims {
 
         #[wasm_bindgen]
         extern {
-            pub type This;
-            pub static this: This;
+            pub type Window;
+            pub static window: Window;
 
             #[wasm_bindgen(method, getter, structural, js_name = self)]
-            pub fn self_(me: &This) -> JsValue;
+            pub fn self_(me: &Window) -> JsValue;
             #[wasm_bindgen(method, getter, structural)]
-            pub fn crypto(me: &This) -> JsValue;
+            pub fn crypto(me: &Window) -> JsValue;
 
             #[derive(Clone, Debug)]
             pub type BrowserCrypto;
diff --git a/src/rngs/os.rs b/src/rngs/os.rs
index ae90261fef6..754be960f24 100644
--- a/src/rngs/os.rs
+++ b/src/rngs/os.rs
@@ -1129,7 +1129,7 @@ mod imp {
             // it turns out we're in node.js then we require the `crypto`
             // package and use that. The API we're using was added in Node 6.x
             // so it should be safe to assume tha it works.
-            if this.self_().is_undefined() {
+            if window.self_().is_undefined() {
                 return Ok(OsRng::Node(node_require("crypto")))
             }
 
@@ -1137,9 +1137,9 @@ mod imp {
             // or web worker). Here we want to try to use
             // `crypto.getRandomValues`, but if `crypto` isn't defined we assume
             // we're in an older web browser and the OS RNG isn't available.
-            let crypto = this.crypto();
+            let crypto = window.crypto();
             if crypto.is_undefined() {
-                let msg = "self.crypto is undefined";
+                let msg = "window.crypto is undefined";
                 return Err(Error::new(ErrorKind::Unavailable, msg))
             }