diff --git a/overviewer_core/src/overviewer.h b/overviewer_core/src/overviewer.h
index 425d33e..a383c4c 100644
--- a/overviewer_core/src/overviewer.h
+++ b/overviewer_core/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 14
+#define OVERVIEWER_EXTENSION_VERSION 15
 
 /* Python PIL, and numpy headers */
 #include <Python.h>
diff --git a/overviewer_core/src/rendermode-lighting.c b/overviewer_core/src/rendermode-lighting.c
index 6a984da..7bda4c4 100644
--- a/overviewer_core/src/rendermode-lighting.c
+++ b/overviewer_core/src/rendermode-lighting.c
@@ -245,8 +245,8 @@ get_lighting_color(RenderModeLighting *self, RenderState *state,
     skylevel = getArrayByte3D(skylight, local_x, local_y, local_z);
     blocklevel = getArrayByte3D(blocklight, local_x, local_y, local_z);
 
-    /* special half-step handling */
-    if (block == 44 || block == 53 || block == 67 || block == 108 || block == 109) {
+    /* special half-step, stairs handling */
+    if (block == 44 || block == 53 || block == 67 || block == 108 || block == 109 || block == 114) {
         unsigned int upper_block;
         
         /* stairs and half-blocks take the skylevel from the upper block if it's transparent */