diff --git a/libavcodec/hqx.c b/libavcodec/hqx.c
index d7e605f63ec1af35ae23048a6b8c6d0e9ab20045..2407b7b9f142e6115225e03178698e96fc6eab5a 100644
--- a/libavcodec/hqx.c
+++ b/libavcodec/hqx.c
@@ -182,7 +182,7 @@ static void hqx_idct_put(uint16_t *dst, ptrdiff_t stride,
 
     for (i = 0; i < 8; i++) {
         for (j = 0; j < 8; j++) {
-            int v = av_clip(block[j + i * 8] + 0x800, 0, 0x1000);
+            int v = av_clip(block[j + i * 8] + 0x800, 0, 0xFFF);
             dst[j] = (v << 4) | (v >> 8);
         }
         dst += stride >> 1;
diff --git a/tests/ref/fate/canopus-hqx422a b/tests/ref/fate/canopus-hqx422a
index 29dc30731c3cc31773f2a3f3ddfce6e8a9229857..0fd25774f05096f4b3e37dbbe3a50ca60937ede8 100644
--- a/tests/ref/fate/canopus-hqx422a
+++ b/tests/ref/fate/canopus-hqx422a
@@ -1,2 +1,2 @@
 #tb 0: 1/25
-0,          0,          0,        1,  8294400, 0x9b38264d
+0,          0,          0,        1,  8294400, 0x9a22bebf