diff --git a/bootstrap/manifest.txt b/bootstrap/manifest.txt
index c9a34da86..9266fcc58 100644
--- a/bootstrap/manifest.txt
+++ b/bootstrap/manifest.txt
@@ -21,7 +21,7 @@ $VerifiedPlatform windows-386 windows-amd64 linux-amd64 mac-amd64
 infra/3pp/tools/cpython/${platform} version:2.7.17.chromium.22
 
 @Subdir python3
-infra/3pp/tools/cpython3/${os}-${arch=amd64} version:3.8.0.chromium.8
+infra/3pp/tools/cpython3/${os}-${arch} version:3.8.0.chromium.8
 
 @Subdir git
 infra/3pp/tools/git/${os}-${arch} version:2.24.1.chromium.5