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-rw-r--r--lib/PublicInbox/xap_helper.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/PublicInbox/xap_helper.h b/lib/PublicInbox/xap_helper.h
index c1ab66f3..1f8c426b 100644
--- a/lib/PublicInbox/xap_helper.h
+++ b/lib/PublicInbox/xap_helper.h
@@ -64,7 +64,7 @@
 #        define MY_DO_OPTRESET() do { optind = optreset = 1; } while (0)
 #endif
 
-#if defined(__FreeBSD__) || defined(__GLIBC__)
+#if defined(__DragonFly__) || defined(__FreeBSD__) || defined(__GLIBC__)
 #        define STDERR_ASSIGNABLE (1)
 #else
 #        define STDERR_ASSIGNABLE (0)