diff --git a/core/keyboard_nav/line_cursor.ts b/core/keyboard_nav/line_cursor.ts
index 8cc51f903..85c0f414a 100644
--- a/core/keyboard_nav/line_cursor.ts
+++ b/core/keyboard_nav/line_cursor.ts
@@ -378,7 +378,7 @@ export class LineCursor extends Marker {
     // Ensure the current node matches what's currently focused.
     const focused = getFocusManager().getFocusedNode();
     const block = this.getSourceBlockFromNode(focused);
-    if (!block || block.workspace === this.workspace) {
+    if (block && block.workspace === this.workspace) {
       // If the current focused node corresponds to a block then ensure that it
       // belongs to the correct workspace for this cursor.
       this.setCurNode(focused);