diff --git a/libavcodec/ptx.c b/libavcodec/ptx.c
index 3f6c746e8c..6b8dbd329d 100644
--- a/libavcodec/ptx.c
+++ b/libavcodec/ptx.c
@@ -58,7 +58,7 @@ static int ptx_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
         return -1;
     }
 
-    avctx->pix_fmt = PIX_FMT_RGB555LE;
+    avctx->pix_fmt = PIX_FMT_BGR555LE;
 
     if (buf_end - buf < offset)
         return AVERROR_INVALIDDATA;
diff --git a/tests/ref/fate/ptx b/tests/ref/fate/ptx
index 8d59468735..7edbbddc4c 100644
--- a/tests/ref/fate/ptx
+++ b/tests/ref/fate/ptx
@@ -1,2 +1,2 @@
 #tb 0: 1/25
-0,          0,          0,        1,   393216, 0x019d9950
+0,          0,          0,        1,   393216, 0x30479950