--- qtbase-opensource-src-5.15.3+dfsg.orig/src/network/ssl/qsslcontext_openssl.cpp
+++ qtbase-opensource-src-5.15.3+dfsg/src/network/ssl/qsslcontext_openssl.cpp
@@ -455,7 +455,7 @@ init_context:
     }
 
     // Enable bug workarounds.
-    long options = QSslSocketBackendPrivate::setupOpenSslOptions(configuration.protocol(), configuration.d->sslOptions);
+    qssloptions options = QSslSocketBackendPrivate::setupOpenSslOptions(configuration.protocol(), configuration.d->sslOptions);
     q_SSL_CTX_set_options(sslContext->ctx, options);
 
     // Tell OpenSSL to release memory early
--- qtbase-opensource-src-5.15.3+dfsg.orig/src/network/ssl/qsslsocket_openssl.cpp
+++ qtbase-opensource-src-5.15.3+dfsg/src/network/ssl/qsslsocket_openssl.cpp
@@ -528,9 +528,9 @@ static void q_loadCiphersForConnection(S
 // Defined in qsslsocket.cpp
 void q_setDefaultDtlsCiphers(const QList<QSslCipher> &ciphers);
 
-long QSslSocketBackendPrivate::setupOpenSslOptions(QSsl::SslProtocol protocol, QSsl::SslOptions sslOptions)
+qssloptions QSslSocketBackendPrivate::setupOpenSslOptions(QSsl::SslProtocol protocol, QSsl::SslOptions sslOptions)
 {
-    long options;
+    qssloptions options;
     if (protocol == QSsl::TlsV1SslV3)
         options = SSL_OP_ALL|SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3;
     else if (protocol == QSsl::SecureProtocols)
--- qtbase-opensource-src-5.15.3+dfsg.orig/src/network/ssl/qsslsocket_openssl_p.h
+++ qtbase-opensource-src-5.15.3+dfsg/src/network/ssl/qsslsocket_openssl_p.h
@@ -107,6 +107,12 @@
 
 QT_BEGIN_NAMESPACE
 
+#if defined(OPENSSL_VERSION_MAJOR) && OPENSSL_VERSION_MAJOR >= 3
+typedef uint64_t qssloptions;
+#else
+typedef long qssloptions;
+#endif
+
 struct QSslErrorEntry {
     int code;
     int depth;
@@ -164,7 +170,7 @@ public:
     QVector<QSslError> ocspErrors;
     QByteArray ocspResponseDer;
 
-    Q_AUTOTEST_EXPORT static long setupOpenSslOptions(QSsl::SslProtocol protocol, QSsl::SslOptions sslOptions);
+    Q_AUTOTEST_EXPORT static qssloptions setupOpenSslOptions(QSsl::SslProtocol protocol, QSsl::SslOptions sslOptions);
     static QSslCipher QSslCipher_from_SSL_CIPHER(const SSL_CIPHER *cipher);
     static QList<QSslCertificate> STACKOFX509_to_QSslCertificates(STACK_OF(X509) *x509);
     static QList<QSslError> verify(const QList<QSslCertificate> &certificateChain, const QString &hostName);
--- qtbase-opensource-src-5.15.3+dfsg.orig/src/network/ssl/qsslsocket_openssl_symbols.cpp
+++ qtbase-opensource-src-5.15.3+dfsg/src/network/ssl/qsslsocket_openssl_symbols.cpp
@@ -157,7 +157,7 @@ DEFINEFUNC2(void, OPENSSL_sk_push, OPENS
 DEFINEFUNC(void, OPENSSL_sk_free, OPENSSL_STACK *a, a, return, DUMMYARG)
 DEFINEFUNC2(void *, OPENSSL_sk_value, OPENSSL_STACK *a, a, int b, b, return nullptr, return)
 DEFINEFUNC(int, SSL_session_reused, SSL *a, a, return 0, return)
-DEFINEFUNC2(unsigned long, SSL_CTX_set_options, SSL_CTX *ctx, ctx, unsigned long op, op, return 0, return)
+DEFINEFUNC2(qssloptions, SSL_CTX_set_options, SSL_CTX *ctx, ctx, qssloptions op, op, return 0, return)
 DEFINEFUNC(int, SSL_CTX_get_security_level, const SSL_CTX *ctx, ctx, return -1, return)
 DEFINEFUNC2(void, SSL_CTX_set_security_level, SSL_CTX *ctx, ctx, int level, level, return, return)
 #ifdef TLS1_3_VERSION
--- qtbase-opensource-src-5.15.3+dfsg.orig/src/network/ssl/qsslsocket_openssl_symbols_p.h
+++ qtbase-opensource-src-5.15.3+dfsg/src/network/ssl/qsslsocket_openssl_symbols_p.h
@@ -244,7 +244,7 @@ Q_AUTOTEST_EXPORT void q_OPENSSL_sk_push
 Q_AUTOTEST_EXPORT void q_OPENSSL_sk_free(OPENSSL_STACK *a);
 Q_AUTOTEST_EXPORT void * q_OPENSSL_sk_value(OPENSSL_STACK *a, int b);
 int q_SSL_session_reused(SSL *a);
-unsigned long q_SSL_CTX_set_options(SSL_CTX *ctx, unsigned long op);
+qssloptions q_SSL_CTX_set_options(SSL_CTX *ctx, qssloptions op);
 int q_OPENSSL_init_ssl(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings);
 size_t q_SSL_get_client_random(SSL *a, unsigned char *out, size_t outlen);
 size_t q_SSL_SESSION_get_master_key(const SSL_SESSION *session, unsigned char *out, size_t outlen);