diff --git a/chrome/content/zotero/bindings/tagsbox.xml b/chrome/content/zotero/bindings/tagsbox.xml
index 7717665146..8ee7d5f943 100644
--- a/chrome/content/zotero/bindings/tagsbox.xml
+++ b/chrome/content/zotero/bindings/tagsbox.xml
@@ -467,7 +467,7 @@
 							else {
 								id = tagsbox.add(value);
 							}
-							if (!id) {
+							if (!id && (this._tabDirection==1)) {
 								this._lastTabIndex--;
 							}
 						}
@@ -752,4 +752,4 @@
 			</xul:scrollbox>
 		</content>
 	</binding>
-</bindings>
+</bindings>
\ No newline at end of file