diff --git a/src/if_py_both.h b/src/if_py_both.h
index 42db510..3e5993b 100644
--- a/src/if_py_both.h
+++ b/src/if_py_both.h
@@ -6136,7 +6136,8 @@
 	    goto err;
 
 	// Check that the command didn't switch to another buffer.
-	if (curbuf != was_curbuf)
+	// Check the line number, the command my have deleted lines.
+	if (curbuf != was_curbuf || lnum > curbuf->b_ml.ml_line_count)
 	{
 	    Py_XDECREF(ret);
 	    goto err;