diff --git a/python/src/notcurses/build_notcurses.py b/python/src/notcurses/build_notcurses.py
index 3a37e897c..f65490d8c 100644
--- a/python/src/notcurses/build_notcurses.py
+++ b/python/src/notcurses/build_notcurses.py
@@ -206,8 +206,8 @@ unsigned cell_bchannel(const cell* cl);
 unsigned cell_fchannel(const cell* cl);
 uint64_t cell_set_bchannel(cell* cl, uint32_t channel);
 uint64_t cell_set_fchannel(cell* cl, uint32_t channel);
-uint64_t cell_blend_fchannel(cell* cl, unsigned channel, unsigned blends);
-uint64_t cell_blend_bchannel(cell* cl, unsigned channel, unsigned blends);
+uint64_t cell_blend_fchannel(cell* cl, unsigned channel, unsigned* blends);
+uint64_t cell_blend_bchannel(cell* cl, unsigned channel, unsigned* blends);
 unsigned cell_fg(const cell* cl);
 unsigned cell_bg(const cell* cl);
 unsigned cell_fg_alpha(const cell* cl);
diff --git a/src/demo/hud.c b/src/demo/hud.c
index 39d56354a..84b1767ed 100644
--- a/src/demo/hud.c
+++ b/src/demo/hud.c
@@ -61,7 +61,7 @@ struct ncmenu* menu_create(struct notcurses* nc){
   struct ncmenu_item demo_items[] = {
     { .desc = "Restart", .shortcut = { .id = 'r', .ctrl = true, }, },
   };
-  const struct ncmenu_section sections[] = {
+  struct ncmenu_section sections[] = {
     { .name = "notcurses-demo", .items = demo_items,
       .itemcount = sizeof(demo_items) / sizeof(*demo_items),
       .shortcut = { .id = 'o', .alt = true, }, },