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-rw-r--r--crypto/mem_sec.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/crypto/mem_sec.c b/crypto/mem_sec.c
index ab4d137f63..1c1327037a 100644
--- a/crypto/mem_sec.c
+++ b/crypto/mem_sec.c
@@ -33,8 +33,10 @@
# include <sys/mman.h>
# if defined(OPENSSL_SYS_LINUX)
# include <sys/syscall.h>
-# include <linux/mman.h>
-# include <errno.h>
+# if defined(SYS_mlock2)
+# include <linux/mman.h>
+# include <errno.h>
+# endif
# endif
# include <sys/param.h>
# include <sys/stat.h>