diff --git a/chrome/content/zotero/xpcom/schema.js b/chrome/content/zotero/xpcom/schema.js
index 19e31f32a..48a620e59 100644
--- a/chrome/content/zotero/xpcom/schema.js
+++ b/chrome/content/zotero/xpcom/schema.js
@@ -1278,6 +1278,8 @@ Zotero.Schema = new function(){
 					Zotero.DB.query("DROP TABLE IF EXISTS userFields");
 					Zotero.DB.query("DROP TABLE IF EXISTS userItemTypeFields");
 					
+					Zotero.DB.query("DROP INDEX IF EXISTS fulltextWords_word");
+					
 					var wordIDs = Zotero.DB.columnQuery("SELECT GROUP_CONCAT(wordID) AS wordIDs FROM fulltextWords GROUP BY word HAVING COUNT(*)>1");
 					if (wordIDs.length) {
 						Zotero.DB.query("CREATE TEMPORARY TABLE deleteWordIDs (wordID INTEGER PRIMARY KEY)");
diff --git a/userdata.sql b/userdata.sql
index 656665505..e2077c05b 100644
--- a/userdata.sql
+++ b/userdata.sql
@@ -183,7 +183,6 @@ CREATE TABLE fulltextWords (
     wordID INTEGER PRIMARY KEY,
     word TEXT UNIQUE
 );
-CREATE INDEX fulltextWords_word ON fulltextWords(word);
 
 CREATE TABLE fulltextItemWords (
     wordID INT,