diff --git a/libavcodec/flacdec.c b/libavcodec/flacdec.c
index b7237e18f0..5f5802c97f 100644
--- a/libavcodec/flacdec.c
+++ b/libavcodec/flacdec.c
@@ -268,7 +268,8 @@ static int decode_subframe_fixed(FLACContext *s, int32_t *decoded,
                                  int pred_order, int bps)
 {
     const int blocksize = s->blocksize;
-    int av_uninit(a), av_uninit(b), av_uninit(c), av_uninit(d), i;
+    unsigned av_uninit(a), av_uninit(b), av_uninit(c), av_uninit(d);
+    int i;
     int ret;
 
     /* warm up samples */