--- ioapi.c.orig	2023-11-17 16:21:50.355864777 +0000
+++ ioapi.c	2023-11-17 16:21:50.355864777 +0000
@@ -14,7 +14,7 @@
         #define _CRT_SECURE_NO_WARNINGS
 #endif
 
-#if defined(__APPLE__) || defined(IOAPI_NO_64) || defined(__HAIKU__) || defined(MINIZIP_FOPEN_NO_64)
+#if defined(__APPLE__) || defined(__ANDROID__) || defined(IOAPI_NO_64) || defined(__HAIKU__) || defined(MINIZIP_FOPEN_NO_64)
 // In darwin and perhaps other BSD variants off_t is a 64 bit value, hence no need for specific 64 bit functions
 #define FOPEN_FUNC(filename, mode) fopen(filename, mode)
 #define FTELLO_FUNC(stream) ftello(stream)
@@ -68,6 +68,7 @@
     p_filefunc64_32->zopen32_file = p_filefunc32->zopen_file;
     p_filefunc64_32->zfile_func64.zread_file = p_filefunc32->zread_file;
     p_filefunc64_32->zfile_func64.zwrite_file = p_filefunc32->zwrite_file;
+    p_filefunc64_32->zfile_func64.zflush_file = p_filefunc32->zflush_file;
     p_filefunc64_32->zfile_func64.ztell64_file = NULL;
     p_filefunc64_32->zfile_func64.zseek64_file = NULL;
     p_filefunc64_32->zfile_func64.zclose_file = p_filefunc32->zclose_file;
@@ -193,6 +194,12 @@
     return ret;
 }
 
+static int ZCALLBACK fflush_file_func (voidpf opaque, voidpf stream)
+{
+    int ret;
+    ret = fflush((FILE *)stream);
+    return ret;
+}
 
 static int ZCALLBACK fclose_file_func(voidpf opaque, voidpf stream) {
     int ret;
@@ -214,6 +221,7 @@
     pzlib_filefunc_def->zwrite_file = fwrite_file_func;
     pzlib_filefunc_def->ztell_file = ftell_file_func;
     pzlib_filefunc_def->zseek_file = fseek_file_func;
+    pzlib_filefunc_def->zflush_file = fflush_file_func;
     pzlib_filefunc_def->zclose_file = fclose_file_func;
     pzlib_filefunc_def->zerror_file = ferror_file_func;
     pzlib_filefunc_def->opaque = NULL;
@@ -225,6 +233,7 @@
     pzlib_filefunc_def->zwrite_file = fwrite_file_func;
     pzlib_filefunc_def->ztell64_file = ftell64_file_func;
     pzlib_filefunc_def->zseek64_file = fseek64_file_func;
+    pzlib_filefunc_def->zflush_file = fflush_file_func;
     pzlib_filefunc_def->zclose_file = fclose_file_func;
     pzlib_filefunc_def->zerror_file = ferror_file_func;
     pzlib_filefunc_def->opaque = NULL;