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-rw-r--r--src/tools/tor-gencert.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/tools/tor-gencert.c b/src/tools/tor-gencert.c
index b5c96e556..2d92e1ee8 100644
--- a/src/tools/tor-gencert.c
+++ b/src/tools/tor-gencert.c
@@ -9,7 +9,9 @@
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
+#ifdef HAVE_UNISTD_H
#include <unistd.h>
+#endif
#include <openssl/evp.h>
#include <openssl/pem.h>