Hello, if I try to compile the following minimal example: cdef class Test: cdef readonly int INFINITY cython does not complain but gcc refuses with an error message: In file included from /usr/include/math.h:38:0, from /usr/include/python2.7/pyport.h:325, from /usr/include/python2.7/Python.h:58, from testinf.c:16: testinf.c:433:7: error: field '__builtin_inff' declared as a function int INFINITY; ^ testinf.c: In function '__pyx_pf_7testinf_4Test_8INFINITY___get__': testinf.c:569:50: error: expected identifier before '(' token __pyx_t_1 = __Pyx_PyInt_From_int(__pyx_v_self->INFINITY); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 10; __pyx_clineno = __LINE__; goto __pyx_L1_error;} ^ Apparently the name "INFINITY" is handled wrongly; any other variable name seems to be fine. Regards, Michael