diff -ur zziplib-0.13.72.orig/zzip/plugin.c zziplib-0.13.72/zzip/plugin.c
--- zziplib-0.13.72.orig/zzip/plugin.c	2021-01-05 08:05:08.000000000 +0900
+++ zziplib-0.13.72/zzip/plugin.c	2022-09-10 21:43:00.000000000 +0900
@@ -41,7 +41,7 @@
     return st.st_size;
 }
 
-static const struct zzip_plugin_io default_io = {
+static struct zzip_plugin_io default_io = {
     &open,
     &close,
     &_zzip_read,
