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-rw-r--r--configure.ac2
1 files changed, 1 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac
index 9ffdd62b..8d324d9f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -90,7 +90,7 @@ AC_LANG([C++])
OPENAXIOM_HOST_COMPILERS
AM_CONDITIONAL([OA_USE_LLVM], [test -n $oa_use_llvm])
-OPENAXIOM_REQUIRE_CXX17
+OPENAXIOM_REQUIRE_CXX([20])
OPENAXIOM_EXTRA_CXX_OPTIONS
AM_CONDITIONAL([OA_BUILD_GCL], [test x$oa_include_gcl = xyes])
AM_CONDITIONAL([OA_ECL_RT], [test x$oa_lisp_flavor = xecl])