diff --git a/.github/workflows/iwyu.yml b/.github/workflows/iwyu.yml
index ac672d70d7e..2f0f01fc0fa 100644
--- a/.github/workflows/iwyu.yml
+++ b/.github/workflows/iwyu.yml
@@ -86,7 +86,7 @@ jobs:
       - name: iwyu_tool
         run: |
           PWD=$(pwd)
-          iwyu_tool -p cmake.output -j $(nproc) -- -w -Xiwyu --max_line_length=1024 -Xiwyu --comment_style=long -Xiwyu --quoted_includes_first -Xiwyu --update_comments -Xiwyu --mapping_file=$PWD/qt5.imp -I/usr/lib/clang/17/include > iwyu.log
+          iwyu_tool -p cmake.output -j $(nproc) -- -w -Xiwyu --max_line_length=1024 -Xiwyu --comment_style=long -Xiwyu --quoted_includes_first -Xiwyu --update_comments -Xiwyu --mapping_file=$PWD/qt5.imp -isystem/usr/lib/clang/17/include > iwyu.log
 
       - uses: actions/upload-artifact@v3
         if: success() || failure()