diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 2df2e1bd1..d724656cf 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -27,6 +27,12 @@ jobs:
           - language: javascript-typescript
             build-mode: none
     steps:
+      # CodeQL C# autobuild doesn't (yet?) recognize .NET Aspire
+      - if: matrix.language == 'csharp'
+        run: |
+          dotnet workload update
+          dotnet workload install aspire
+
       - name: Checkout repository
         uses: actions/checkout@v4