diff --git a/src/overviewer.h b/src/overviewer.h
index 184cd4e..49e70fa 100644
--- a/src/overviewer.h
+++ b/src/overviewer.h
@@ -26,7 +26,7 @@
 
 // increment this value if you've made a change to the c extesion
 // and want to force users to rebuild
-#define OVERVIEWER_EXTENSION_VERSION 6
+#define OVERVIEWER_EXTENSION_VERSION 7
 
 /* Python PIL, and numpy headers */
 #include <Python.h>
diff --git a/src/rendermode-normal.c b/src/rendermode-normal.c
index e4247fa..d975ed9 100644
--- a/src/rendermode-normal.c
+++ b/src/rendermode-normal.c
@@ -66,6 +66,7 @@ rendermode_normal_start(void *data, RenderState *state) {
             self->leaf_texture = PyObject_GetAttrString(state->textures, "biome_leaf_texture");
             self->grass_texture = PyObject_GetAttrString(state->textures, "biome_grass_texture");
             self->tall_grass_texture = PyObject_GetAttrString(state->textures, "biome_tall_grass_texture");
+            self->tall_fern_texture = PyObject_GetAttrString(state->textures, "biome_tall_fern_texture");
 
             facemasks_py = PyObject_GetAttrString(state->chunk, "facemasks");
             /* borrowed reference, needs to be incref'd if we keep it */
@@ -81,6 +82,7 @@ rendermode_normal_start(void *data, RenderState *state) {
         self->leaf_texture = NULL;
         self->grass_texture = NULL;
         self->tall_grass_texture = NULL;
+        self->tall_fern_texture = NULL;
         self->facemask_top = NULL;
     }
     
@@ -102,6 +104,7 @@ rendermode_normal_finish(void *data, RenderState *state) {
     Py_XDECREF(self->leaf_texture);
     Py_XDECREF(self->grass_texture);
     Py_XDECREF(self->tall_grass_texture);
+    Py_XDECREF(self->tall_fern_texture);
     Py_XDECREF(self->facemask_top);
 }
 
diff --git a/textures.py b/textures.py
index 02c26c3..101b933 100644
--- a/textures.py
+++ b/textures.py
@@ -1678,7 +1678,7 @@ def generate(path=None):
     load_water()
     
     # generate biome (still grayscale) leaf, grass textures
-    global biome_grass_texture, biome_leaf_texture, biome_tall_grass_texture
+    global biome_grass_texture, biome_leaf_texture, biome_tall_grass_texture, biome_tall_fern_texture
     biome_grass_texture = _build_block(terrain_images[0], terrain_images[38], 2)
     biome_leaf_texture = _build_block(terrain_images[52], terrain_images[52], 18)
     biome_tall_grass_texture = _build_block(terrain_images[39], terrain_images[39], 31)