make error

[haibianshifeng]

/home/lei/mamba/src/materials/Clay.C:34:21: error: binding ‘const VariableValue {aka const MooseArray}’ to reference of type ‘VariableValue& {aka MooseArray&}’ discards qualifiers
_T(coupledValue("temperature"))
^
make: *** [/home/lei/mamba/src/materials/Clay.x86_64-unknown-linux-gnu.opt.lo] 错误 1