qtbase fails to compile

In file included from ssl/qsslsocket_openssl_symbols.cpp:51:0:
ssl/qsslsocket_openssl_symbols.cpp: In function ‘DH* q_d2i_DHparams(DH**, unsigned char**, long int)’:
ssl/qsslsocket_openssl_symbols_p.h:185:58: error: invalid conversion from ‘unsigned char**’ to ‘const unsigned char**’ [-fpermissive]
     ret q_##func(arg1, arg2, arg3) { funcret func(a, b, c); }
                                                          ^
ssl/qsslsocket_openssl_symbols.cpp:402:1: note: in expansion of macro ‘DEFINEFUNC3’
 DEFINEFUNC3(DH *, d2i_DHparams, DH**a, a, unsigned char **pp, pp, long length, length, return 0, return);
 ^
In file included from /usr/include/openssl/dsa.h:83:0,
                 from /usr/include/openssl/x509.h:99,
                 from /usr/include/openssl/ssl.h:156,
                 from ../../include/QtNetwork/5.6.0/QtNetwork/private/../../../../../src/network/ssl/qsslcontext_openssl_p.h:53,
                 from ../../include/QtNetwork/5.6.0/QtNetwork/private/qsslcontext_openssl_p.h:1,
                 from ssl/qsslsocket_p.h:55,
                 from ssl/qsslsocket_openssl_p.h:63,
                 from ssl/qsslsocket_openssl_symbols_p.h:64,
                 from ssl/qsslsocket_openssl_symbols.cpp:51:
/usr/include/openssl/dh.h:224:5: note: initializing argument 2 of ‘DH* d2i_DHparams(DH**, const unsigned char**, long int)’
 DH *d2i_DHparams(DH **a, const unsigned char **pp, long length);
     ^
Makefile:22955: recipe for target '.obj/qsslsocket_openssl_symbols.o' failed