diff --git a/src/rendermode-cave.c b/src/rendermode-cave.c
index ae5b565..e51742c 100644
--- a/src/rendermode-cave.c
+++ b/src/rendermode-cave.c
@@ -219,7 +219,7 @@ rendermode_cave_draw(void *data, RenderState *state, PyObject *src, PyObject *ma
     g = PyInt_AsLong(PyList_GetItem(self->depth_colors, 1 + z*3));
     b = PyInt_AsLong(PyList_GetItem(self->depth_colors, 2 + z*3));
 
-    tint_with_mask(state->img, r, g, b, mask, state->imgx, state->imgy, 0, 0);
+    tint_with_mask(state->img, r, g, b, 255, mask, state->imgx, state->imgy, 0, 0);
 
 }