diff --git a/src/m4af.c b/src/m4af.c
index 45c2f7a..7f3b180 100644
--- a/src/m4af.c
+++ b/src/m4af.c
@@ -1382,7 +1382,6 @@ uint64_t m4af_patch_moov(m4af_ctx_t *ctx, uint32_t moov_size, uint32_t offset)
 static
 void m4af_shift_mdat_pos(m4af_ctx_t *ctx, uint32_t offset)
 {
-    unsigned i, j;
     int64_t begin, end;
     char *buf;