diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3be9b3a1d..51cef6a20 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -392,7 +392,7 @@ jobs:
               c++11) export CSTD=c11 ;;
               c++14) export CSTD=c11 ;;
               c++17) export CSTD=c17 ;;
-              c++20) export CSTD=c20 ;;
+              c++20) export CSTD=c17 ;;
             esac
             echo CSTD="$CSTD" >> $GITHUB_ENV
           fi