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-rw-r--r--crypto/des/des_opts.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/crypto/des/des_opts.c b/crypto/des/des_opts.c
index fdf0fbf461..29d9461d29 100644
--- a/crypto/des/des_opts.c
+++ b/crypto/des/des_opts.c
@@ -92,7 +92,8 @@ struct tms {
#include <sys/timeb.h>
#endif
-#ifdef sun
+#if defined(sun) || defined(__ultrix)
+#define _POSIX_SOURCE
#include <limits.h>
#include <sys/param.h>
#endif