diff --git a/src/Tls.cpp b/src/Tls.cpp
index 1700f6d2..e98a092b 100644
--- a/src/Tls.cpp
+++ b/src/Tls.cpp
@@ -279,9 +279,13 @@ bool TlsSession_openssl::verifyHostname(X509* certificate, const char* hostname)
 		int count = sk_GENERAL_NAME_num(names);
 		for (int i = 0; i < count; ++i) {
 			const GENERAL_NAME* check = sk_GENERAL_NAME_value(names, i);
+#if OPENSSL_VERSION_NUMBER <= 0x1000211fL
+			const unsigned char* name = ASN1_STRING_data(check->d.ia5);
+#else
 			const char* name = ASN1_STRING_get0_data(check->d.ia5);
+#endif
 			size_t length = ASN1_STRING_length(check->d.ia5);
-			if (wildcardMatch(std::string(name, length).c_str(), hostname)) {
+			if (wildcardMatch(std::string((const char*)name, length).c_str(), hostname)) {
 				verified = true;
 				break;
 			}
@@ -295,9 +299,13 @@ bool TlsSession_openssl::verifyHostname(X509* certificate, const char* hostname)
 			if (entry) {
 				ASN1_STRING* asn1 = X509_NAME_ENTRY_get_data(entry);
 				if (asn1) {
+#if OPENSSL_VERSION_NUMBER <= 0x1000211fL
+					const unsigned char* commonName = ASN1_STRING_data(asn1);
+#else
 					const char* commonName = ASN1_STRING_get0_data(asn1);
-					if (static_cast<size_t>(ASN1_STRING_length(asn1)) == std::strlen(commonName)) {
-						verified = wildcardMatch(commonName, hostname);
+#endif
+					if (static_cast<size_t>(ASN1_STRING_length(asn1)) == std::strlen((const char*)commonName)) {
+						verified = wildcardMatch((const char*)commonName, hostname);
 					}
 				}
 			}