@@ -178,7 +178,7 @@ jobs:
 
   test-docs:
     needs: [ruff, mypy, sdist]
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 15
     steps:
       - uses: libsdl-org/setup-sdl@1894460666e4fe0c6603ea0cce5733f1cca56ba1
@@ -201,6 +201,7 @@ jobs:
         run: pip install -e .
         env:
           TDL_BUILD: DEBUG
+          CFLAGS: "-D _POSIX_C_SOURCE 2"
       - name: Test doc generation
         working-directory: docs
         run: python -m sphinx -T -E -W --keep-going . _build/html