1 files changed, 5 insertions, 2 deletions

diff --git a/include/unarchive.h b/include/unarchive.h
index 783a943b6..aa7ecec55 100644
--- a/include/unarchive.h
+++ b/include/unarchive.h
@@ -155,9 +155,12 @@ IF_DESKTOP(long long) int unpack_Z_stream(int src_fd, int dst_fd) FAST_FUNC;
 /* wrapper which checks first two bytes to be "BZ" */
 IF_DESKTOP(long long) int unpack_bz2_stream_prime(int src_fd, int dst_fd) FAST_FUNC;
 
+char* append_ext(char *filename, const char *expected_ext) FAST_FUNC;
 int bbunpack(char **argv,
-             char* (*make_new_name)(char *filename),
-             IF_DESKTOP(long long) int (*unpacker)(unpack_info_t *info)) FAST_FUNC;
+            IF_DESKTOP(long long) int FAST_FUNC (*unpacker)(unpack_info_t *info),
+            char* FAST_FUNC (*make_new_name)(char *filename, const char *expected_ext),
+            const char *expected_ext
+) FAST_FUNC;
 
 #if BB_MMU
 void open_transformer(int fd,