diff --git a/archival/libunarchive/seek_by_jump.c b/archival/libunarchive/seek_by_jump.c
index efad97f..2823976 100644
--- a/archival/libunarchive/seek_by_jump.c
+++ b/archival/libunarchive/seek_by_jump.c
@@ -25,7 +25,7 @@
 extern void seek_by_jump(const archive_handle_t *archive_handle, const unsigned int amount)
 {
 	if (lseek(archive_handle->src_fd, (off_t) amount, SEEK_CUR) == (off_t) -1) {
-#if CONFIG_FEATURE_UNARCHIVE_TAPE
+#ifdef CONFIG_FEATURE_UNARCHIVE_TAPE
 		if (errno == ESPIPE) {
 			seek_by_char(archive_handle, amount);
 		} else