diff --git a/src/vs/workbench/contrib/notebook/browser/contrib/navigation/arrow.ts b/src/vs/workbench/contrib/notebook/browser/contrib/navigation/arrow.ts
index a82d730c183..d6ea5ca6b22 100644
--- a/src/vs/workbench/contrib/notebook/browser/contrib/navigation/arrow.ts
+++ b/src/vs/workbench/contrib/notebook/browser/contrib/navigation/arrow.ts
@@ -63,7 +63,7 @@ registerAction2(class extends NotebookCellAction {
 			return;
 		}
 
-		if (idx >= editor.getLength()) {
+		if (idx >= editor.getLength() - 1) {
 			// last one
 			return;
 		}