diff --git a/src/libssl_compat.h b/src/libssl_compat.h
index fa8e6f65..0e03bfd7 100644
--- a/src/libssl_compat.h
+++ b/src/libssl_compat.h
@@ -37,7 +37,13 @@
 
 #include <openssl/opensslv.h>
 
+#if defined(LIBRESSL_VERSION_NUMBER)
+#define LIBRESSL_IN_USE 1
+#else // !defined(LIBRESSL_VERSION_NUMBER)
+#define LIBRESSL_IN_USE 0
+#endif // !defined(LIBRESSL_VERSION_NUMBER)
+
 #define OPENSSL_101_API                                                        \
-  (!defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER >= 0x1010000fL)
+  (!LIBRESSL_IN_USE && OPENSSL_VERSION_NUMBER >= 0x1010000fL)
 
 #endif // LIBSSL_COMPAT_H