diff --git a/src/client/Client.js b/src/client/Client.js
index a57a2f04f..0fd8c18e6 100644
--- a/src/client/Client.js
+++ b/src/client/Client.js
@@ -359,7 +359,7 @@ class Client extends EventEmitter {
    * @returns {Collection<string, VoiceRegion>}
    */
   fetchVoiceRegions() {
-    return this.rest.api.voice.regions.get().then(res => {
+    return this.api.voice.regions.get().then(res => {
       const regions = new Collection();
       for (const region of res) regions.set(region.id, new VoiceRegion(region));
       return regions;
diff --git a/src/structures/Guild.js b/src/structures/Guild.js
index 5f1108292..bb9003b15 100644
--- a/src/structures/Guild.js
+++ b/src/structures/Guild.js
@@ -975,7 +975,7 @@ class Guild {
    */
   leave() {
     if (this.ownerID === this.client.user.id) return Promise.reject(new Error('Guild is owned by the client.'));
-    return this.rest.api.users('@me').guilds(this.id).delete()
+    return this.client.api.users('@me').guilds(this.id).delete()
     .then(() => this.client.actions.GuildDelete.handle({ id: this.id }).guild);
   }
 
diff --git a/src/structures/GuildChannel.js b/src/structures/GuildChannel.js
index 1d5750a3d..81976e987 100644
--- a/src/structures/GuildChannel.js
+++ b/src/structures/GuildChannel.js
@@ -283,10 +283,10 @@ class GuildChannel extends Channel {
    * kicked after 24 hours if they have not yet received a role
    * @param {number} [options.maxAge=86400] How long the invite should last (in seconds, 0 for forever)
    * @param {number} [options.maxUses=0] Maximum number of uses
-   * @param {string} [reason] Reason for creating this
+   * @param {string} [options.reason] Reason for creating this
    * @returns {Promise<Invite>}
    */
-  createInvite({ temporary = false, maxAge = 86400, maxUses = 0 }, reason) {
+  createInvite({ temporary = false, maxAge = 86400, maxUses = 0, reason } = {}) {
     return this.client.api.channels(this.id).invites.post({ data: {
       temporary, max_age: maxAge, max_uses: maxUses,
     }, reason })
diff --git a/src/structures/interfaces/TextBasedChannel.js b/src/structures/interfaces/TextBasedChannel.js
index 7c3b64fda..da16b9958 100644
--- a/src/structures/interfaces/TextBasedChannel.js
+++ b/src/structures/interfaces/TextBasedChannel.js
@@ -379,7 +379,7 @@ class TextBasedChannel {
           Date.now() - Snowflake.deconstruct(id).date.getTime() < 1209600000
         );
       }
-      return this.rest.api.channels(this.id).messages['bulk-delete']
+      return this.client.api.channels(this.id).messages()['bulk-delete']
       .post({ data: { messages: messageIDs } })
       .then(() =>
         this.client.actions.MessageDeleteBulk.handle({
@@ -398,7 +398,7 @@ class TextBasedChannel {
    */
   acknowledge() {
     if (!this.lastMessageID) return Promise.resolve(this);
-    return this.client.api.channels(this.id).messages(this.lastMessageID)
+    return this.client.api.channels(this.id).messages(this.lastMessageID).ack
       .post({ data: { token: this.client.rest._ackToken } })
       .then(res => {
         if (res.token) this.client.rest._ackToken = res.token;