1 files changed, 11 insertions, 6 deletions

diff --git a/e_os.h b/e_os.h
index e33c56dccb..bd864240b1 100644
--- a/e_os.h
+++ b/e_os.h
@@ -299,11 +299,16 @@ struct servent *getservbyname(const char *name, const char *proto);
 #  define CRYPTO_memcmp memcmp
 # endif
 
-/* unistd.h defines _POSIX_VERSION */
-# if !defined(OPENSSL_NO_SECURE_MEMORY) && defined(OPENSSL_SYS_UNIX) \
-     && ( (defined(_POSIX_VERSION) && _POSIX_VERSION >= 200112L)      \
-          || defined(__sun) || defined(__hpux) || defined(__sgi)      \
-          || defined(__osf__) )
-#  define OPENSSL_SECURE_MEMORY  /* secure memory is implemented */
+# ifndef OPENSSL_NO_SECURE_MEMORY
+   /* unistd.h defines _POSIX_VERSION */
+#  if defined(OPENSSL_SYS_UNIX) \
+      && ( (defined(_POSIX_VERSION) && _POSIX_VERSION >= 200112L)      \
+           || defined(__sun) || defined(__hpux) || defined(__sgi)      \
+           || defined(__osf__) )
+      /* secure memory is implemented */
+#   else
+#     define OPENSSL_NO_SECURE_MEMORY
+#   endif
 # endif
+
 #endif