diff --git a/examples/topics/geometry/lsystems.ipynb b/examples/topics/geometry/lsystems.ipynb
index 2f38f6f507..78411996f5 100644
--- a/examples/topics/geometry/lsystems.ipynb
+++ b/examples/topics/geometry/lsystems.ipynb
@@ -71,7 +71,6 @@
     "        self.x, self.y = x,y\n",
     "        self.heading = heading\n",
     "        self.trace = [(self.x, self.y)]\n",
-    "        self.state = None\n",
     "        \n",
     "    def forward(self, distance):\n",
     "        self.x += np.cos(2*np.pi * self.heading/360.0)\n",
@@ -417,7 +416,7 @@
     "    path.extents = (minx-xpadding, miny-ypadding, maxx+xpadding, maxy+ypadding)\n",
     "    return path\n",
     "    \n",
-    "hmap = hv.HoloMap()\n",
+    "hmap = hv.HoloMap(kdims=['Iteration'])\n",
     "for i in range(7,17):\n",
     "    path = Agent(-200, 0, expand_rules('FX', i, dragon_curve), rules=dragon_rules, angle=90).path\n",
     "    hmap[i] = pad_extents(path)\n",
@@ -528,7 +527,7 @@
    "outputs": [],
    "source": [
     "%%opts Path {+framewise} (color='g' line_width=1)\n",
-    "hmap = hv.HoloMap()\n",
+    "hmap = hv.HoloMap(kdims=['Iteration'])\n",
     "for i in range(7):\n",
     "    instructions = expand_rules('X', i, plant_fractal)\n",
     "    if i > 2:\n",