diff --git a/logic/InstanceList.cpp b/logic/InstanceList.cpp
index 5a988fd3a..8a68c334a 100644
--- a/logic/InstanceList.cpp
+++ b/logic/InstanceList.cpp
@@ -283,9 +283,9 @@ void InstanceList::loadGroupList(QMap<QString, QString> &groupMap)
 	}
 }
 
-QList<FTBRecord> InstanceList::discoverFTBInstances()
+QSet<FTBRecord> InstanceList::discoverFTBInstances()
 {
-	QList<FTBRecord> records;
+	QSet<FTBRecord> records;
 	QDir dir = QDir(MMC->settings()->get("FTBLauncherDataRoot").toString());
 	QDir dataDir = QDir(MMC->settings()->get("FTBRoot").toString());
 	if (!dataDir.exists())
@@ -333,7 +333,7 @@ QList<FTBRecord> InstanceList::discoverFTBInstances()
 					record.logo = attrs.value("logo").toString();
 					record.mcVersion = attrs.value("mcVersion").toString();
 					record.description = attrs.value("description").toString();
-					records.append(record);
+					records.insert(record);
 				}
 				break;
 			}
diff --git a/logic/InstanceList.h b/logic/InstanceList.h
index f0bbb7ec0..b88a080ed 100644
--- a/logic/InstanceList.h
+++ b/logic/InstanceList.h
@@ -36,14 +36,23 @@ struct FTBRecord
 	QString description;
 	QString instanceDir;
 	QString templateDir;
+	bool operator ==(const FTBRecord other) const
+	{
+		return instanceDir == other.instanceDir;
+	}
 };
 
+inline uint qHash(FTBRecord record)
+{
+	return qHash(record.instanceDir);
+}
+
 class InstanceList : public QAbstractListModel
 {
 	Q_OBJECT
 private:
 	void loadGroupList(QMap<QString, QString> &groupList);
-	QList<FTBRecord> discoverFTBInstances();
+	QSet<FTBRecord> discoverFTBInstances();
 	void loadFTBInstances(QMap<QString, QString> &groupMap, QList<InstancePtr> & tempList);
 
 private