diff --git a/magic/src/halftone.c b/magic/src/halftone.c
index b9c5257d4..df0c8f71d 100644
--- a/magic/src/halftone.c
+++ b/magic/src/halftone.c
@@ -1,6 +1,6 @@
 /* halftone.c
 
-  Last updated: February 12, 2023
+  Last updated: April 22, 2023
 */
 
 
@@ -64,7 +64,7 @@ void halftone_drag(magic_api * api, int which, SDL_Surface * canvas,
 void halftone_line_callback(void *ptr, int which, SDL_Surface * canvas,
                             SDL_Surface * snapshot, int x, int y);
 Uint32 halftone_api_version(void);
-int halftone_init(magic_api * api);
+int halftone_init(magic_api * api, Uint32 disabled_features);
 int halftone_get_tool_count(magic_api * api);
 SDL_Surface *halftone_get_icon(magic_api * api, int which);
 char *halftone_get_name(magic_api * api, int which);
@@ -86,13 +86,18 @@ void halftone_switchin(magic_api * api, int which, int mode,
 void halftone_switchout(magic_api * api, int which, int mode,
                         SDL_Surface * canvas);
 void halftone_rgb2cmyk(Uint8 r, Uint8 g, Uint8 b, float cmyk[]);
+Uint8 halftone_accepted_sizes(magic_api * api, int which, int mode);
+Uint8 halftone_default_size(magic_api * api, int which, int mode);
+void halftone_set_size(magic_api * api, int which, int mode, SDL_Surface * canvas, SDL_Surface * last, Uint8 size, SDL_Rect * update_rect);
+
+
 
 Uint32 halftone_api_version(void)
 {
   return (TP_MAGIC_API_VERSION);
 }
 
-int halftone_init(magic_api * api)
+int halftone_init(magic_api * api, Uint32 disabled_features ATTRIBUTE_UNUSED)
 {
   int i;
   char fname[1024];
@@ -447,3 +452,18 @@ void halftone_rgb2cmyk(Uint8 r, Uint8 g, Uint8 b, float cmyk[])
   cmyk[2] = y;
   cmyk[3] = k;
 }
+
+
+Uint8 halftone_accepted_sizes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
+{
+  return 0; // No size support at this time
+}
+
+Uint8 halftone_default_size(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
+{
+  return 0; // No size support at this time
+}
+
+void halftone_set_size(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED, SDL_Surface * canvas ATTRIBUTE_UNUSED, SDL_Surface * last ATTRIBUTE_UNUSED, Uint8 size ATTRIBUTE_UNUSED, SDL_Rect * update_rect ATTRIBUTE_UNUSED)
+{
+}