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-rw-r--r--rts/posix/OSThreads.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/rts/posix/OSThreads.c b/rts/posix/OSThreads.c
index 45f394208f..c9adf4e6eb 100644
--- a/rts/posix/OSThreads.c
+++ b/rts/posix/OSThreads.c
@@ -9,9 +9,9 @@
#include "PosixSource.h"
-#if defined(freebsd_HOST_OS)
-/* Inclusion of system headers usually requires __BSD_VISIBLE on FreeBSD,
- * because of some specific types, like u_char, u_int, etc. */
+#if defined(freebsd_HOST_OS) || defined(dragonfly_HOST_OS)
+/* Inclusion of system headers usually requires __BSD_VISIBLE on FreeBSD and
+ * DragonflyBSD, because of some specific types, like u_char, u_int, etc. */
#define __BSD_VISIBLE 1
#endif
#if defined(darwin_HOST_OS)