diff --git a/src/radiation/radiation_system.hpp b/src/radiation/radiation_system.hpp
index 8c5b2ef7f..816d3f77f 100644
--- a/src/radiation/radiation_system.hpp
+++ b/src/radiation/radiation_system.hpp
@@ -1455,7 +1455,6 @@ AMREX_GPU_DEVICE auto RadSystem<problem_t>::ComputeDustTemperatureBateKeto(doubl
 		double dLHS_dTd = NAN;
 
 		if constexpr (nGroups_ == 1) {
-			const auto kappaE = ComputeEnergyMeanOpacity(rho, T_d);
 			const auto kappaP = ComputePlanckOpacity(rho, T_d);
 			const auto d_fourpib_over_c_d_t = ComputeThermalRadiationTempDerivativeSingleGroup(T_d);
 			dLHS_dTd = -c_hat_ * dt * rho * (kappaP * d_fourpib_over_c_d_t) - N_d * std::sqrt(T_gas);