diff --git a/libavcodec/jfdctint_template.c b/libavcodec/jfdctint_template.c
index aa2680132e..58827b677e 100644
--- a/libavcodec/jfdctint_template.c
+++ b/libavcodec/jfdctint_template.c
@@ -183,7 +183,7 @@ static av_always_inline void FUNC(row_fdct)(int16_t *data)
 {
   int tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
   int tmp10, tmp11, tmp12, tmp13;
-  int z1, z2, z3, z4, z5;
+  unsigned z1, z2, z3, z4, z5;
   int16_t *dataptr;
   int ctr;