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-rw-r--r--src/gzip.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/gzip.h b/src/gzip.h
index 7283e3f..28aa9d5 100644
--- a/src/gzip.h
+++ b/src/gzip.h
@@ -66,7 +66,7 @@ int
opkg_opk_gzip_write(struct opkg_opk_gzip *gzip, void *record, size_t size);
size_t
-opkg_opk_gzip_written(struct opkg_opk_gzip *gzip);
+opkg_opk_gzip_written(struct opkg_opk_gzip *gzip) __attribute__((__pure__));
int
opkg_opk_gzip_finish_write(struct opkg_opk_gzip *gzip);