identifier "__shfl_down" is undefined for cuda-7.5

While compiling a program on cuda 7.5 with gcc 4.8.4 on ubuntu 14.04 (pretty old config), I get this error

error: identifier "__shfl_down" is undefined
      detected during instantiation of "T gmx_shfl_down_sync(unsigned int, T, unsigned int, int) [with T=float]"

which point to

template <typename T>
static __forceinline__ __device__
T gmx_shfl_down_sync(const unsigned int activeMask,
                 const T            var,
                 unsigned int       offset,
                 int                width = warp_size)
{
#if GMX_CUDA_VERSION < 9000
    GMX_UNUSED_VALUE(activeMask);
    return __shfl_down(var, offset, width);
#else
    return __shfl_down_sync(activeMask, var, offset, width);
#endif
}

Is there any way to fix that? I see this issue for old cuda versions, but haven't seen a clear answer for that.