--- ghostscript-9.53.3/base/fapi_ft.c.orig	2020-10-27 21:25:07.965599700 +0300
+++ ghostscript-9.53.3/base/fapi_ft.c	2020-10-27 21:27:29.261301600 +0300
@@ -125,7 +125,7 @@
 delete_inc_int_info(gs_fapi_server * a_server,
                     FT_IncrementalRec * a_inc_int_info);
 
-FT_CALLBACK_DEF(void *)
+void *
 FF_alloc(FT_Memory memory, long size)
 {
     gs_memory_t *mem = (gs_memory_t *) memory->user;
@@ -133,7 +133,7 @@
     return (gs_malloc(mem, size, 1, "FF_alloc"));
 }
 
-FT_CALLBACK_DEF(void *)
+void *
     FF_realloc(FT_Memory memory, long cur_size, long new_size, void *block)
 {
     gs_memory_t *mem = (gs_memory_t *) memory->user;
@@ -153,7 +153,7 @@
     return (tmp);
 }
 
-FT_CALLBACK_DEF(void)
+void
     FF_free(FT_Memory memory, void *block)
 {
     gs_memory_t *mem = (gs_memory_t *) memory->user;
