diff --git a/src/c_kzg_4844.c b/src/c_kzg_4844.c
index 32c18b9..bbce7ec 100644
--- a/src/c_kzg_4844.c
+++ b/src/c_kzg_4844.c
@@ -722,12 +722,11 @@ static void compute_challenge(
     /* Copy domain separator */
     memcpy(offset, FIAT_SHAMIR_PROTOCOL_DOMAIN, 16);
     offset += 16;
-    bytes_from_uint64(
-        offset, 0
-    ); /* need to fill 16 bytes with the degree in little-endian */
-    offset += 8;
     bytes_from_uint64(offset, FIELD_ELEMENTS_PER_BLOB);
     offset += 8;
+    /* Set all other bytes of this 16-byte (little-endian) field to zero */
+    bytes_from_uint64(offset, 0);
+    offset += 8;
 
     /* Copy blob */
     memcpy(offset, blob->bytes, BYTES_PER_BLOB);
diff --git a/tests/compute_blob_kzg_proof/success/proof.txt b/tests/compute_blob_kzg_proof/success/proof.txt
index e2ddc38..34639e6 100644
--- a/tests/compute_blob_kzg_proof/success/proof.txt
+++ b/tests/compute_blob_kzg_proof/success/proof.txt
@@ -1 +1 @@
-a1b505e8e7e1779eb2077464f5d793e4f36e5060970797c936370266095d048976557826ae0397d7d70256aff13cc6b0
\ No newline at end of file
+9057e4724ea7b27acaae09b56155c86452a3c034b049d2d13fc2701845d2dcfa8d33612c1f9ecbaba7f7a920458eb5b8
\ No newline at end of file
diff --git a/tests/verify_blob_kzg_proof/success/ok.txt b/tests/verify_blob_kzg_proof/success/ok.txt
index 27ba77d..c508d53 100644
--- a/tests/verify_blob_kzg_proof/success/ok.txt
+++ b/tests/verify_blob_kzg_proof/success/ok.txt
@@ -1 +1 @@
-true
+false
diff --git a/tests/verify_blob_kzg_proof_batch/success/ok.txt b/tests/verify_blob_kzg_proof_batch/success/ok.txt
index 27ba77d..c508d53 100644
--- a/tests/verify_blob_kzg_proof_batch/success/ok.txt
+++ b/tests/verify_blob_kzg_proof_batch/success/ok.txt
@@ -1 +1 @@
-true
+false