--- a/include/common/openssl-compat.h
+++ b/include/common/openssl-compat.h
@@ -217,7 +217,8 @@ static inline int EVP_PKEY_base_id(EVP_PKEY *pkey)
 #define TLSEXT_signature_ecdsa      3
 #endif
 
-#if (OPENSSL_VERSION_NUMBER < 0x10100000L) || (LIBRESSL_VERSION_NUMBER < 0x20700000L)
+#if (OPENSSL_VERSION_NUMBER < 0x10100000L) || \
+	(defined(LIBRESSL_VERSION_NUMBER) && (LIBRESSL_VERSION_NUMBER < 0x20700000L))
 #define X509_getm_notBefore     X509_get_notBefore
 #define X509_getm_notAfter      X509_get_notAfter
 #endif