diff --git a/src/index.ts b/src/index.ts
index 40a856f..3be4257 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -228,7 +228,7 @@ class TabGroup extends HTMLElement {
 
   getTabByRelPosition(position: number) {
     position = this.getActiveTab().getPosition() + position;
-    if (position <= 0) {
+    if (position < 0) {
       return null;
     }
     return this.getTabByPosition(position);