--- a/taskcluster/ci/build/windows.yml
+++ b/taskcluster/ci/build/windows.yml
@@ -253,16 +253,17 @@ win64-plain/opt:
         - win64-clang-cl
         - win64-rust
         - win64-nasm
         - win64-node
         - win64-cbindgen
 
 win32-shippable/opt:
     description: "Win32 Opt Shippable"
+    use-pgo: true
     index:
         product: firefox
         job-name: win32-opt
         type: shippable
     attributes:
         shippable: true
         enable-full-crashsymbols: true
     stub-installer:
@@ -275,17 +276,17 @@ win32-shippable/opt:
                 by-project:
                     # browser/confvars.sh looks for nightly-try
                     try: true
                     default: false
     shipping-phase: build
     shipping-product: firefox
     treeherder:
         platform: windows2012-32-shippable/opt
-        symbol: B
+        symbol: Bpgo(B)
         tier: 1
     worker-type: b-win2012
     worker:
         max-run-time: 10800
         env:
             TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win32/releng.manifest"
     run:
         options: [append-env-variables-from-configs]