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-rw-r--r--libexec/atf/Makefile.inc2
1 files changed, 2 insertions, 0 deletions
diff --git a/libexec/atf/Makefile.inc b/libexec/atf/Makefile.inc
index 5fd06c35cd09..52ecd1a7da34 100644
--- a/libexec/atf/Makefile.inc
+++ b/libexec/atf/Makefile.inc
@@ -28,6 +28,8 @@ PACKAGE?= atf
LIB_PACKAGE=
CFLAGS+= -DHAVE_CONFIG_H
+CXXSTD= gnu++20
+
WARNS?= 3
.include "../Makefile.inc"