diff --git a/spec/unit/matrix-client.spec.js b/spec/unit/matrix-client.spec.js
index 5d870754d..029ae1bb5 100644
--- a/spec/unit/matrix-client.spec.js
+++ b/spec/unit/matrix-client.spec.js
@@ -154,12 +154,9 @@ describe("MatrixClient", function() {
         });
         // FIXME: We shouldn't be yanking _http like this.
         client._http = [
-            "authedRequest", "authedRequestWithPrefix", "getContentUri",
-            "request", "requestWithPrefix", "uploadContent",
+            "authedRequest", "getContentUri", "request", "uploadContent",
         ].reduce((r, k) => { r[k] = expect.createSpy(); return r; }, {});
         client._http.authedRequest.andCall(httpReq);
-        client._http.authedRequestWithPrefix.andCall(httpReq);
-        client._http.requestWithPrefix.andCall(httpReq);
         client._http.request.andCall(httpReq);
 
         // set reasonable working defaults
@@ -181,9 +178,6 @@ describe("MatrixClient", function() {
         client._http.authedRequest.andCall(function() {
             return Promise.defer().promise;
         });
-        client._http.authedRequestWithPrefix.andCall(function() {
-            return Promise.defer().promise;
-        });
     });
 
     it("should not POST /filter if a matching filter already exists", async function() {
diff --git a/src/base-apis.js b/src/base-apis.js
index 83cd35b16..1d1ffb54a 100644
--- a/src/base-apis.js
+++ b/src/base-apis.js
@@ -475,8 +475,10 @@ MatrixBaseApis.prototype.fetchRelations =
             $relationType: relationType,
             $eventType: eventType,
         });
-    const response = await this._http.authedRequestWithPrefix(
-        undefined, "GET", path, null, null, httpApi.PREFIX_UNSTABLE,
+    const response = await this._http.authedRequest(
+        undefined, "GET", path, null, null, {
+            prefix: httpApi.PREFIX_UNSTABLE,
+        },
     );
     return response;
 };
diff --git a/src/client.js b/src/client.js
index df673885c..76b50b491 100644
--- a/src/client.js
+++ b/src/client.js
@@ -1369,8 +1369,10 @@ MatrixClient.prototype.getGroups = function() {
  * @return {module:client.Promise} Resolves with an object containing the config.
  */
 MatrixClient.prototype.getMediaConfig = function(callback) {
-    return this._http.authedRequestWithPrefix(
-        callback, "GET", "/config", undefined, undefined, httpApi.PREFIX_MEDIA_R0,
+    return this._http.authedRequest(
+        callback, "GET", "/config", undefined, undefined, {
+            prefix: httpApi.PREFIX_MEDIA_R0,
+        },
     );
 };
 
@@ -2275,11 +2277,13 @@ MatrixClient.prototype.getUrlPreview = function(url, ts, callback) {
     }
 
     const self = this;
-    return this._http.authedRequestWithPrefix(
+    return this._http.authedRequest(
         callback, "GET", "/preview_url", {
             url: url,
             ts: ts,
-        }, undefined, httpApi.PREFIX_MEDIA_R0,
+        }, undefined, {
+            prefix: httpApi.PREFIX_MEDIA_R0,
+        },
     ).then(function(response) {
         // TODO: expire cache occasionally
         self.urlPreviewCache[key] = response;
diff --git a/src/http-api.js b/src/http-api.js
index 374c00644..ef95527ab 100644
--- a/src/http-api.js
+++ b/src/http-api.js
@@ -531,76 +531,6 @@ module.exports.MatrixHttpApi.prototype = {
         );
     },
 
-    /**
-     * Perform an authorised request to the homeserver with a specific path
-     * prefix which overrides the default for this call only. Useful for hitting
-     * different Matrix Client-Server versions.
-     * @param {Function} callback Optional. The callback to invoke on
-     * success/failure. See the promise return values for more information.
-     * @param {string} method The HTTP method e.g. "GET".
-     * @param {string} path The HTTP path <b>after</b> the supplied prefix e.g.
-     * "/createRoom".
-     * @param {Object} queryParams A dict of query params (these will NOT be
-     * urlencoded).
-     * @param {Object} data The HTTP JSON body.
-     * @param {string} prefix The full prefix to use e.g.
-     * "/_matrix/client/v2_alpha".
-     * @param {Number=} localTimeoutMs The maximum amount of time to wait before
-     * timing out the request. If not specified, there is no timeout.
-     * @return {module:client.Promise} Resolves to <code>{data: {Object},
-     * headers: {Object}, code: {Number}}</code>.
-     * If <code>onlyData</code> is set, this will resolve to the <code>data</code>
-     * object only.
-     * @return {module:http-api.MatrixError} Rejects with an error if a problem
-     * occurred. This includes network problems and Matrix-specific error JSON.
-     *
-     * @deprecated prefer authedRequest with opts.prefix
-     */
-    authedRequestWithPrefix: function(callback, method, path, queryParams, data,
-                                      prefix, localTimeoutMs) {
-        return this.authedRequest(
-            callback, method, path, queryParams, data, {
-                localTimeoutMs: localTimeoutMs,
-                prefix: prefix,
-            },
-        );
-    },
-
-    /**
-     * Perform a request to the homeserver without any credentials but with a
-     * specific path prefix which overrides the default for this call only.
-     * Useful for hitting different Matrix Client-Server versions.
-     * @param {Function} callback Optional. The callback to invoke on
-     * success/failure. See the promise return values for more information.
-     * @param {string} method The HTTP method e.g. "GET".
-     * @param {string} path The HTTP path <b>after</b> the supplied prefix e.g.
-     * "/createRoom".
-     * @param {Object} queryParams A dict of query params (these will NOT be
-     * urlencoded).
-     * @param {Object} data The HTTP JSON body.
-     * @param {string} prefix The full prefix to use e.g.
-     * "/_matrix/client/v2_alpha".
-     * @param {Number=} localTimeoutMs The maximum amount of time to wait before
-     * timing out the request. If not specified, there is no timeout.
-     * @return {module:client.Promise} Resolves to <code>{data: {Object},
-     * headers: {Object}, code: {Number}}</code>.
-     * If <code>onlyData</code> is set, this will resolve to the <code>data</code>
-     * object only.
-     * @return {module:http-api.MatrixError} Rejects with an error if a problem
-     * occurred. This includes network problems and Matrix-specific error JSON.
-     *
-     * @deprecated prefer request with opts.prefix
-     */
-    requestWithPrefix: function(callback, method, path, queryParams, data, prefix,
-                                localTimeoutMs) {
-        return this.request(
-            callback, method, path, queryParams, data, {
-                localTimeoutMs: localTimeoutMs,
-                prefix: prefix,
-            },
-        );
-    },
-
     /**
      * Perform a request to an arbitrary URL.
      * @param {Function} callback Optional. The callback to invoke on