diff --git a/libavcodec/xwddec.c b/libavcodec/xwddec.c
index 8b0845fc01..592c98dd4e 100644
--- a/libavcodec/xwddec.c
+++ b/libavcodec/xwddec.c
@@ -227,7 +227,7 @@ static int xwd_decode_frame(AVCodecContext *avctx, void *data,
             blue   = bytestream2_get_byteu(&gb);
             bytestream2_skipu(&gb, 3); // skip bitmask flag and padding
 
-            dst[i] = red << 16 | green << 8 | blue;
+            dst[i] = 0xFFU << 24 | red << 16 | green << 8 | blue;
         }
     }
 
diff --git a/tests/ref/lavf/xwd b/tests/ref/lavf/xwd
index 3d638211cb..b263ce6991 100644
--- a/tests/ref/lavf/xwd
+++ b/tests/ref/lavf/xwd
@@ -11,10 +11,10 @@ c0866e9e710fce735423594a93bee604 *./tests/data/images/xwd/02.xwd
 ./tests/data/images/xwd/%02d.xwd CRC=0x14555d6e
 202863 ./tests/data/images/xwd/02.xwd
 c6f3cb7c45f7238474a89d2ad61a1caf *./tests/data/images/xwd/02.xwd
-./tests/data/images/xwd/%02d.xwd CRC=0xfaafb59b
+./tests/data/images/xwd/%02d.xwd CRC=0xf217a95e
 104559 ./tests/data/images/xwd/02.xwd
 fe1af954966a40c2cd35fc27094ff823 *./tests/data/images/xwd/02.xwd
-./tests/data/images/xwd/%02d.xwd CRC=0xd69c3a09
+./tests/data/images/xwd/%02d.xwd CRC=0xce042dcc
 104559 ./tests/data/images/xwd/02.xwd
 85e9b8b814a1dea71d143aac2e487037 *./tests/data/images/xwd/02.xwd
 ./tests/data/images/xwd/%02d.xwd CRC=0x0ff205be