diff --git a/libswscale/swscale_unscaled.c b/libswscale/swscale_unscaled.c
index 08cc2ed146..aaef02fdd5 100644
--- a/libswscale/swscale_unscaled.c
+++ b/libswscale/swscale_unscaled.c
@@ -146,8 +146,14 @@ static void fillPlane16(uint8_t *plane, int stride, int width, int height, int y
     uint8_t *ptr = plane + stride * y;
     int v = alpha ? 0xFFFF>>(15-bits) : (1<<bits);
     for (i = 0; i < height; i++) {
-        for (j = 0; j < width; j++) {
-            AV_WN16(ptr+2*j, v);
+#define FILL(wfunc) \
+        for (j = 0; j < width; j++) {\
+            wfunc(ptr+2*j, v);\
+        }
+        if (big_endian) {
+            FILL(AV_WB16);
+        } else {
+            FILL(AV_WL16);
         }
         ptr += stride;
     }
diff --git a/tests/ref/lavfi/pixfmts_copy b/tests/ref/lavfi/pixfmts_copy
index d13af3d591..53640cd33b 100644
--- a/tests/ref/lavfi/pixfmts_copy
+++ b/tests/ref/lavfi/pixfmts_copy
@@ -74,11 +74,11 @@ yuv444p16le         96a857dba8dc6792c58daec872825b32
 yuv444p9be          07727e5c9040b7f0a17d591288ac330d
 yuv444p9le          4d12d20a68dc28618594c96c2ade4ff4
 yuva420p            3a8c5c142e051367c196f95696e0e2c3
-yuva420p10be        c15ea36665ebb6c6400b2817f8dc0959
+yuva420p10be        1b7c5ec6691498e24676ce6ed97f62f8
 yuva420p10le        ad2d0424033e7acbafa6d58f59b4487e
 yuva420p16be        6afcf758f4b66c0b4173c942d42212d7
 yuva420p16le        13e195aa96329eb49921b6f9f07b875c
-yuva420p9be         bfbc86280eb417d53c3e09df1d6628b2
+yuva420p9be         05a78390de312dfd21ac666a9da05fbd
 yuva420p9le         78f5593bf51a31841ef83df41d0316eb
 yuva422p            45ae66d6f69fd5b77e6831e98d228bf4
 yuva422p10be        90ce250a517843b3e8a1ac0f4fdad733
diff --git a/tests/ref/lavfi/pixfmts_null b/tests/ref/lavfi/pixfmts_null
index d13af3d591..53640cd33b 100644
--- a/tests/ref/lavfi/pixfmts_null
+++ b/tests/ref/lavfi/pixfmts_null
@@ -74,11 +74,11 @@ yuv444p16le         96a857dba8dc6792c58daec872825b32
 yuv444p9be          07727e5c9040b7f0a17d591288ac330d
 yuv444p9le          4d12d20a68dc28618594c96c2ade4ff4
 yuva420p            3a8c5c142e051367c196f95696e0e2c3
-yuva420p10be        c15ea36665ebb6c6400b2817f8dc0959
+yuva420p10be        1b7c5ec6691498e24676ce6ed97f62f8
 yuva420p10le        ad2d0424033e7acbafa6d58f59b4487e
 yuva420p16be        6afcf758f4b66c0b4173c942d42212d7
 yuva420p16le        13e195aa96329eb49921b6f9f07b875c
-yuva420p9be         bfbc86280eb417d53c3e09df1d6628b2
+yuva420p9be         05a78390de312dfd21ac666a9da05fbd
 yuva420p9le         78f5593bf51a31841ef83df41d0316eb
 yuva422p            45ae66d6f69fd5b77e6831e98d228bf4
 yuva422p10be        90ce250a517843b3e8a1ac0f4fdad733
diff --git a/tests/ref/lavfi/pixfmts_pixdesctest b/tests/ref/lavfi/pixfmts_pixdesctest
index 67e5925ce4..8844a1ce71 100644
--- a/tests/ref/lavfi/pixfmts_pixdesctest
+++ b/tests/ref/lavfi/pixfmts_pixdesctest
@@ -74,11 +74,11 @@ yuv444p16le         96a857dba8dc6792c58daec872825b32
 yuv444p9be          07727e5c9040b7f0a17d591288ac330d
 yuv444p9le          4d12d20a68dc28618594c96c2ade4ff4
 yuva420p            3a8c5c142e051367c196f95696e0e2c3
-yuva420p10be        a3fd7193dc4abb551ab7f88b7e366d33
+yuva420p10be        1b7c5ec6691498e24676ce6ed97f62f8
 yuva420p10le        ad2d0424033e7acbafa6d58f59b4487e
 yuva420p16be        6afcf758f4b66c0b4173c942d42212d7
 yuva420p16le        13e195aa96329eb49921b6f9f07b875c
-yuva420p9be         cb12ffe4ea54b118020b97d7bc0c7fe5
+yuva420p9be         05a78390de312dfd21ac666a9da05fbd
 yuva420p9le         78f5593bf51a31841ef83df41d0316eb
 yuva422p            45ae66d6f69fd5b77e6831e98d228bf4
 yuva422p10be        90ce250a517843b3e8a1ac0f4fdad733
diff --git a/tests/ref/lavfi/pixfmts_scale b/tests/ref/lavfi/pixfmts_scale
index 76d7d34666..b0ffc4731d 100644
--- a/tests/ref/lavfi/pixfmts_scale
+++ b/tests/ref/lavfi/pixfmts_scale
@@ -74,11 +74,11 @@ yuv444p16le         f8bac16bf1f2afbd3626e07bcc815a9f
 yuv444p9be          db739906e3ae3b8792cdc5a0c3387565
 yuv444p9le          693b8d30958ef1a37296b1690b4b36d2
 yuva420p            df46b738bdaf30d3a7f880b5ae45b092
-yuva420p10be        8e5f3b069fdf2f0c14f49ad827991092
+yuva420p10be        6dc9de933b1033aea729907fcf9d392d
 yuva420p10le        e6915376ad7d0f2be9d50099e5ee33ef
 yuva420p16be        aa8ca29a93936c62ef038ca8a57f47d7
 yuva420p16le        ee0cbb31f9cdb897c1982df0caa8ffa0
-yuva420p9be         b8ca5603123aeb953b9d4fc8ec8e35e1
+yuva420p9be         38aa61fcb702a956c3bf0dfca63441e2
 yuva420p9le         220212a81cda0f2d112f7ae96d532ff9
 yuva422p            650755270debb03d2c03b2e93b64c576
 yuva422p10be        fe0d8c2509d2d23f856093f9aea83cba
diff --git a/tests/ref/lavfi/pixfmts_vflip b/tests/ref/lavfi/pixfmts_vflip
index 45082f79ac..66d796aa76 100644
--- a/tests/ref/lavfi/pixfmts_vflip
+++ b/tests/ref/lavfi/pixfmts_vflip
@@ -74,11 +74,11 @@ yuv444p16le         201e3acfa6f7628dfe2a1663de1128b1
 yuv444p9be          6143c321929ade9e0bc93ddea926e936
 yuv444p9le          e43ba2026848ec803fabf74d77c10125
 yuva420p            dc8fd115eaf203a3eac351b92a7d8f18
-yuva420p10be        8dc20d4b654a82680dcb75391f1c8c28
+yuva420p10be        b3aaa8a5c9b9c3c9d66053159af3ec99
 yuva420p10le        f43a991e8b5fe7e192cf4e0dfee2b6cb
 yuva420p16be        b5c54895e87521f65a298d33bab5eb08
 yuva420p16le        95e208bc6644e23a2126ac5fca085f06
-yuva420p9be         aa122367fc3fde822f812a4b878893f8
+yuva420p9be         1ba55d16f060bf54698dd7200523b44f
 yuva420p9le         4b57b8bd1534743f6740502c74bef385
 yuva422p            6091f9c62a121c09eadb02e9173b2da2
 yuva422p10be        93b6afb2b1d1538b1c87caa040c43f4e