diff --git a/ethereum/executionclient/src/integration-test/java/tech/pegasys/teku/ethereum/executionclient/rest/RestBuilderClientTest.java b/ethereum/executionclient/src/integration-test/java/tech/pegasys/teku/ethereum/executionclient/rest/RestBuilderClientTest.java
index 1e2f467a8a9..f2adbca4c58 100644
--- a/ethereum/executionclient/src/integration-test/java/tech/pegasys/teku/ethereum/executionclient/rest/RestBuilderClientTest.java
+++ b/ethereum/executionclient/src/integration-test/java/tech/pegasys/teku/ethereum/executionclient/rest/RestBuilderClientTest.java
@@ -673,9 +673,12 @@ private void runGetPayloadSuccessAsJson() {
               verifyBuilderPayloadResponse(builderPayload);
             });
     final Consumer<RecordedRequest> containsConsensusVersionHeader =
-        req ->
-            assertThat(req.getHeader("Eth-Consensus-Version"))
-                .isEqualTo(milestone.name().toLowerCase(Locale.ROOT));
+        req -> {
+          assertThat(req.getHeader("Eth-Consensus-Version"))
+              .isEqualTo(milestone.name().toLowerCase(Locale.ROOT));
+          assertThat(req.getHeader("Accept"))
+              .isEqualTo("application/octet-stream;q=1.0,application/json;q=0.9");
+        };
     verifyRequest(
         "POST",
         "/eth/v1/builder/blinded_blocks",
diff --git a/ethereum/executionclient/src/main/java/tech/pegasys/teku/ethereum/executionclient/rest/RestBuilderClient.java b/ethereum/executionclient/src/main/java/tech/pegasys/teku/ethereum/executionclient/rest/RestBuilderClient.java
index 2768534e6db..1ce10a5c806 100644
--- a/ethereum/executionclient/src/main/java/tech/pegasys/teku/ethereum/executionclient/rest/RestBuilderClient.java
+++ b/ethereum/executionclient/src/main/java/tech/pegasys/teku/ethereum/executionclient/rest/RestBuilderClient.java
@@ -212,7 +212,9 @@ public SafeFuture<Response<BuilderPayload>> getPayload(
     return restClient
         .postAsync(
             BuilderApiMethod.GET_PAYLOAD.getPath(),
-            Map.of(HEADER_CONSENSUS_VERSION, milestone.name().toLowerCase(Locale.ROOT)),
+            Map.ofEntries(
+                Map.entry(HEADER_CONSENSUS_VERSION, milestone.name().toLowerCase(Locale.ROOT)),
+                ACCEPT_HEADER),
             signedBlindedBeaconBlock,
             LAST_RECEIVED_HEADER_WAS_IN_SSZ.get(),
             responseTypeDefinition)