diff --git a/libavcodec/fitsdec.c b/libavcodec/fitsdec.c
index 1f06754f8b..32a79cdd0d 100644
--- a/libavcodec/fitsdec.c
+++ b/libavcodec/fitsdec.c
@@ -279,7 +279,7 @@ static int fits_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
             for (j = 0; j < avctx->width; j++) { \
                 t = rd; \
                 if (!header.blank_found || t != header.blank) { \
-                    *dst++ = ((t - header.data_min) * ((1 << (sizeof(type) * 8)) - 1)) * scale; \
+                    *dst++ = lrint(((t - header.data_min) * ((1 << (sizeof(type) * 8)) - 1)) * scale); \
                 } else { \
                     *dst++ = fitsctx->blank_val; \
                 } \
diff --git a/tests/ref/fate/fitsdec-bitpix-32 b/tests/ref/fate/fitsdec-bitpix-32
index 9bce361555..b3a51401d4 100644
--- a/tests/ref/fate/fitsdec-bitpix-32
+++ b/tests/ref/fate/fitsdec-bitpix-32
@@ -3,4 +3,4 @@
 #codec_id 0: rawvideo
 #dimensions 0: 102x109
 #sar 0: 0/1
-0,          0,          0,        1,    22236, 0x34490902
+0,          0,          0,        1,    22236, 0x24634517
diff --git a/tests/ref/fate/fitsdec-bitpix-64 b/tests/ref/fate/fitsdec-bitpix-64
index 9febdd68f4..e50d5e029c 100644
--- a/tests/ref/fate/fitsdec-bitpix-64
+++ b/tests/ref/fate/fitsdec-bitpix-64
@@ -3,4 +3,4 @@
 #codec_id 0: rawvideo
 #dimensions 0: 77x173
 #sar 0: 0/1
-0,          0,          0,        1,    26642, 0x0ad2a46a
+0,          0,          0,        1,    26642, 0xa9eec634
diff --git a/tests/ref/fate/fitsdec-blank_bitpix32 b/tests/ref/fate/fitsdec-blank_bitpix32
index 184fd41c59..330d6710ca 100644
--- a/tests/ref/fate/fitsdec-blank_bitpix32
+++ b/tests/ref/fate/fitsdec-blank_bitpix32
@@ -3,4 +3,4 @@
 #codec_id 0: rawvideo
 #dimensions 0: 256x256
 #sar 0: 0/1
-0,          0,          0,        1,   131072, 0x7fb22427
+0,          0,          0,        1,   131072, 0x3ecd0739
diff --git a/tests/ref/fate/fitsdec-ext_data_min_max b/tests/ref/fate/fitsdec-ext_data_min_max
index 9009a4efb3..006d8d6250 100644
--- a/tests/ref/fate/fitsdec-ext_data_min_max
+++ b/tests/ref/fate/fitsdec-ext_data_min_max
@@ -3,4 +3,4 @@
 #codec_id 0: rawvideo
 #dimensions 0: 512x512
 #sar 0: 0/1
-0,          0,          0,        1,   524288, 0xc327ed23
+0,          0,          0,        1,   524288, 0x6567ecb3
diff --git a/tests/ref/fate/fitsdec-gray b/tests/ref/fate/fitsdec-gray
index 425b31fc0f..d080732452 100644
--- a/tests/ref/fate/fitsdec-gray
+++ b/tests/ref/fate/fitsdec-gray
@@ -3,4 +3,4 @@
 #codec_id 0: rawvideo
 #dimensions 0: 128x128
 #sar 0: 0/1
-0,          0,          0,        1,    16384, 0xd788a2d2
+0,          0,          0,        1,    16384, 0x353dbacd
diff --git a/tests/ref/lavf/fits b/tests/ref/lavf/fits
index 489542b32b..50b5fb78a2 100644
--- a/tests/ref/lavf/fits
+++ b/tests/ref/lavf/fits
@@ -3,7 +3,7 @@ ed9fd697d0d782df6201f6a2db184552 *./tests/data/lavf/graylavf.fits
 ./tests/data/lavf/graylavf.fits CRC=0xbacf446c
 48e6caf6a59e32f9a8a39979c9183a7f *./tests/data/lavf/gray16belavf.fits
 10368000 ./tests/data/lavf/gray16belavf.fits
-./tests/data/lavf/gray16belavf.fits CRC=0xae2b58d4
+./tests/data/lavf/gray16belavf.fits CRC=0xce89ed97
 be2f7112fd193c9a909304c81e662769 *./tests/data/lavf/gbrplavf.fits
 15408000 ./tests/data/lavf/gbrplavf.fits
 ./tests/data/lavf/gbrplavf.fits CRC=0x04ed3828