diff --git a/packages/app-builder-lib/src/targets/ArchiveTarget.ts b/packages/app-builder-lib/src/targets/ArchiveTarget.ts
index 272c25fc76d..5d5afa42fa6 100644
--- a/packages/app-builder-lib/src/targets/ArchiveTarget.ts
+++ b/packages/app-builder-lib/src/targets/ArchiveTarget.ts
@@ -72,7 +72,7 @@ export class ArchiveTarget extends Target {
 
         if (this.isWriteUpdateInfo && format === "zip") {
           if (isMac) {
-            updateInfo = await createBlockmap(artifactPath, this, packager, artifactName)
+            updateInfo = await createBlockmap(artifactPath, this, packager, artifactName, arch)
           } else {
             updateInfo = await appendBlockmap(artifactPath)
           }
diff --git a/packages/app-builder-lib/src/targets/differentialUpdateInfoBuilder.ts b/packages/app-builder-lib/src/targets/differentialUpdateInfoBuilder.ts
index b5c71541367..0c5c4d14c9f 100644
--- a/packages/app-builder-lib/src/targets/differentialUpdateInfoBuilder.ts
+++ b/packages/app-builder-lib/src/targets/differentialUpdateInfoBuilder.ts
@@ -1,4 +1,4 @@
-import { log } from "builder-util"
+import { Arch, log } from "builder-util"
 import { BlockMapDataHolder, PackageFileInfo } from "builder-util-runtime"
 import * as path from "path"
 import { Target } from "../core"
@@ -67,7 +67,13 @@ export async function appendBlockmap(file: string): Promise<BlockMapDataHolder>
   return await executeAppBuilderAsJson<BlockMapDataHolder>(["blockmap", "--input", file, "--compression", "deflate"])
 }
 
-export async function createBlockmap(file: string, target: Target, packager: PlatformPackager<any>, safeArtifactName: string | null): Promise<BlockMapDataHolder> {
+export async function createBlockmap(
+  file: string,
+  target: Target,
+  packager: PlatformPackager<any>,
+  safeArtifactName: string | null,
+  arch: Arch | null = null
+): Promise<BlockMapDataHolder> {
   const blockMapFile = `${file}${BLOCK_MAP_FILE_SUFFIX}`
   log.info({ blockMapFile: log.filePath(blockMapFile) }, "building block map")
   const updateInfo = await executeAppBuilderAsJson<BlockMapDataHolder>(["blockmap", "--input", file, "--output", blockMapFile])
@@ -75,7 +81,7 @@ export async function createBlockmap(file: string, target: Target, packager: Pla
     file: blockMapFile,
     safeArtifactName: safeArtifactName == null ? null : `${safeArtifactName}${BLOCK_MAP_FILE_SUFFIX}`,
     target,
-    arch: null,
+    arch,
     packager,
     updateInfo,
   })
diff --git a/packages/app-builder-lib/src/targets/nsis/NsisTarget.ts b/packages/app-builder-lib/src/targets/nsis/NsisTarget.ts
index d95633edaf2..048ecc3ab35 100644
--- a/packages/app-builder-lib/src/targets/nsis/NsisTarget.ts
+++ b/packages/app-builder-lib/src/targets/nsis/NsisTarget.ts
@@ -366,7 +366,7 @@ export class NsisTarget extends Target {
       if (this.isWebInstaller) {
         updateInfo = createNsisWebDifferentialUpdateInfo(installerPath, packageFiles)
       } else if (this.isBuildDifferentialAware) {
-        updateInfo = await createBlockmap(installerPath, this, packager, safeArtifactName)
+        updateInfo = await createBlockmap(installerPath, this, packager, safeArtifactName, primaryArch)
       }
 
       if (updateInfo != null && isPerMachine && (oneClick || options.packElevateHelper)) {
diff --git a/packages/dmg-builder/src/dmg.ts b/packages/dmg-builder/src/dmg.ts
index 9366636f922..5dc6cd1e873 100644
--- a/packages/dmg-builder/src/dmg.ts
+++ b/packages/dmg-builder/src/dmg.ts
@@ -96,7 +96,7 @@ export class DmgTarget extends Target {
     }
 
     const safeArtifactName = packager.computeSafeArtifactName(artifactName, "dmg")
-    const updateInfo = this.options.writeUpdateInfo === false ? null : await createBlockmap(artifactPath, this, packager, safeArtifactName)
+    const updateInfo = this.options.writeUpdateInfo === false ? null : await createBlockmap(artifactPath, this, packager, safeArtifactName, arch)
     await packager.info.emitArtifactBuildCompleted({
       file: artifactPath,
       safeArtifactName,