diff --git a/lib/Structures/ServerChannel.js b/lib/Structures/ServerChannel.js
index 27de222f7..2b450cf0d 100644
--- a/lib/Structures/ServerChannel.js
+++ b/lib/Structures/ServerChannel.js
@@ -65,7 +65,7 @@ var ServerChannel = (function (_Channel) {
 			this.permissionOverwrites.forEach(function (overwrite) {
 				if (overwrite.type === "member" && overwrite.id === user.id) {
 					memberOverwrites.push(overwrite);
-				} else if (overwrite.type === "role" && overwrite.id in userRolesID) {
+				} else if (overwrite.type === "role" && ~userRolesID.indexOf(overwrite.id)) {
 					roleOverwrites.push(overwrite);
 				}
 			});
diff --git a/src/Structures/ServerChannel.js b/src/Structures/ServerChannel.js
index 19141fd3c..cf340a0af 100644
--- a/src/Structures/ServerChannel.js
+++ b/src/Structures/ServerChannel.js
@@ -34,9 +34,9 @@ export default class ServerChannel extends Channel{
 			var roleOverwrites = [], memberOverwrites = [];
 
 			this.permissionOverwrites.forEach((overwrite) => {
-				if(overwrite.type === "member" && overwrite.id === user.id){
+				if (overwrite.type === "member" && overwrite.id === user.id) {
 					memberOverwrites.push(overwrite);
-				}else if(overwrite.type === "role" && overwrite.id in userRolesID){
+				} else if (overwrite.type === "role" && ~userRolesID.indexOf(overwrite.id)) {
 					roleOverwrites.push(overwrite);
 				}
 			});