diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 4ac85668..5f0530bd 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -670,7 +670,7 @@ jobs:
           echo "moved to $(pwd)"
           GAM_ARCHIVE="${GITHUB_WORKSPACE}/gam-${GAMVERSION}-windows-${GAM_ARCHIVE_ARCH}.zip"
           /c/Program\ Files/7-Zip/7z.exe a -tzip "$GAM_ARCHIVE" gam7 "-xr@${GITHUB_WORKSPACE}/.github/actions/package_exclusions.txt" -bb3
-          if [ "RUNNER_ARCH" == "X64" ]; then
+          if [ "$RUNNER_ARCH" == "X64" ]; then
             cd ../..
             echo "moved to $(pwd)"
             export MSI_FILENAME="${GITHUB_WORKSPACE}/gam-${GAMVERSION}-windows-${GAM_ARCHIVE_ARCH}.msi"