diff --git a/jruby/lib/io/console/common.rb b/jruby/lib/io/console/common.rb
index 9252bd9..b75a39a 100644
--- a/jruby/lib/io/console/common.rb
+++ b/jruby/lib/io/console/common.rb
@@ -108,6 +108,7 @@ def cursor
         end
       end
 
+      return nil unless b && result.length == 2
       result.map(&:pred)
     end
   end
diff --git a/test/io/console/test_io_console.rb b/test/io/console/test_io_console.rb
index 48743fc..8b80754 100644
--- a/test/io/console/test_io_console.rb
+++ b/test/io/console/test_io_console.rb
@@ -456,6 +456,8 @@ def test_cursor_position
         con.cursor_right(4); con.puts
         con.cursor_left(2); con.puts
         con.cursor_up(1); con.puts
+        p con.cursor
+        p con.cursor
       end;
       assert_equal("\e[6n", r.readpartial(5))
       w.print("\e[12;34R"); w.flush
@@ -464,6 +466,14 @@ def test_cursor_position
       assert_equal("\e[4C", r.gets.chomp)
       assert_equal("\e[2D", r.gets.chomp)
       assert_equal("\e[1A", r.gets.chomp)
+
+      assert_equal("\e[6n", r.readpartial(5))
+      w.print("\e[12R"); w.flush
+      assert_equal("nil", r.gets.chomp)
+
+      assert_equal("\e[6n", r.readpartial(5))
+      w.print("\e[12;34;56R"); w.flush
+      assert_equal("nil", r.gets.chomp)
     end
   end