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-rw-r--r--src/src/arc.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/src/arc.c b/src/src/arc.c
index 52c1c7625..8a94015b3 100644
--- a/src/src/arc.c
+++ b/src/src/arc.c
@@ -7,6 +7,7 @@
*/
#include "exim.h"
+#if defined EXPERIMENTAL_ARC
# if defined DISABLE_DKIM
# error DKIM must also be enabled for ARC
# else