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Diffstat (limited to 'boost/asio/ssl/detail/openssl_types.hpp')
-rw-r--r--boost/asio/ssl/detail/openssl_types.hpp4
1 files changed, 3 insertions, 1 deletions
diff --git a/boost/asio/ssl/detail/openssl_types.hpp b/boost/asio/ssl/detail/openssl_types.hpp
index 752fe587de..a3c3729332 100644
--- a/boost/asio/ssl/detail/openssl_types.hpp
+++ b/boost/asio/ssl/detail/openssl_types.hpp
@@ -18,7 +18,9 @@
#include <boost/asio/detail/config.hpp>
#include <openssl/conf.h>
#include <openssl/ssl.h>
-#include <openssl/engine.h>
+#if !defined(OPENSSL_NO_ENGINE)
+# include <openssl/engine.h>
+#endif // !defined(OPENSSL_NO_ENGINE)
#include <openssl/err.h>
#include <openssl/x509v3.h>
#include <boost/asio/detail/socket_types.hpp>