diff --git a/.cloudbuild/prod.yaml b/.cloudbuild/prod.yaml
index 68f67b858..4c1cb8e33 100644
--- a/.cloudbuild/prod.yaml
+++ b/.cloudbuild/prod.yaml
@@ -1,12 +1,14 @@
 steps:
   - name: gcr.io/cloud-builders/docker
-    args: ['build', '-t', 'gcr.io/$PROJECT_ID/dendrite-monolith:$TAG_NAME', '-f', 'Dockerfile', '.']
+    args: ['build', '--build-arg', 'BUILDPLATFORM=${_BUILD_PLATFORM}', '-t', 'gcr.io/$PROJECT_ID/dendrite-monolith:$TAG_NAME', '-f', 'Dockerfile', '.']
   - name: gcr.io/cloud-builders/kubectl
     args: ['set', 'image', 'deployment/dendrite', 'dendrite=gcr.io/$PROJECT_ID/dendrite-monolith:$TAG_NAME']
     env:
       - CLOUDSDK_CORE_PROJECT=globekeeper-production
       - CLOUDSDK_COMPUTE_ZONE=europe-west2-a
       - CLOUDSDK_CONTAINER_CLUSTER=synapse-production
+substitutions:
+  _BUILD_PLATFORM: linux/amd64 # default
 images:
   - gcr.io/$PROJECT_ID/dendrite-monolith:$TAG_NAME
 timeout: 480s