diff --git a/bin/xbps-repo/index.c b/bin/xbps-repo/index.c
index b00c814c9f2..b58fcae98bf 100644
--- a/bin/xbps-repo/index.c
+++ b/bin/xbps-repo/index.c
@@ -98,7 +98,8 @@ repoidx_addpkg(const char *file, const char *filename, const char *pkgdir)
 	archive_read_support_compression_all(ar);
 	archive_read_support_format_all(ar);
 
-	if ((rv = archive_read_open_filename(ar, file, 2048)) == -1) {
+	if ((rv = archive_read_open_filename(ar, file,
+	     ARCHIVE_READ_BLOCKSIZE)) == -1) {
 		archive_read_finish(ar);
 		return errno;
 	}
diff --git a/include/xbps_api.h b/include/xbps_api.h
index 31197ed062d..27c63a8f73b 100644
--- a/include/xbps_api.h
+++ b/include/xbps_api.h
@@ -59,6 +59,8 @@
 /* Verbose messages */
 #define XBPS_VERBOSE		0x00000001
 
+#define ARCHIVE_READ_BLOCKSIZE	2048
+
 /* from lib/cmpver.c */
 int		xbps_cmpver_packages(const char *, const char *);
 int		xbps_cmpver_versions(const char *, const char *);
diff --git a/lib/unpack.c b/lib/unpack.c
index 4b080b2ef14..e61f6ee635d 100644
--- a/lib/unpack.c
+++ b/lib/unpack.c
@@ -92,7 +92,8 @@ unpack_archive_init(prop_dictionary_t pkg, const char *binfile)
 	archive_read_support_format_all(ar);
 
 	/* 2048 is arbitrary... dunno what value is better. */
-	if ((rv = archive_read_open_fd(ar, pkg_fd, 2048)) != 0) {
+	if ((rv = archive_read_open_fd(ar, pkg_fd,
+	     ARCHIVE_READ_BLOCKSIZE)) != 0) {
 		archive_read_finish(ar);
 		(void)close(pkg_fd);
 		return rv;