diff --git a/src/machine/m_at_socket8.c b/src/machine/m_at_socket8.c
index 578d9ae8a..1442711fd 100644
--- a/src/machine/m_at_socket8.c
+++ b/src/machine/m_at_socket8.c
@@ -192,8 +192,10 @@ machine_at_p2bls_init(const machine_t *model)
     		0
     	}
     };
+#if defined(DEV_BRANCH) && defined(USE_I686)
     if (model->cpu[cpu_manufacturer].cpus[cpu_effective].cpu_type == CPU_PENTIUM2)
     	machine_hwm.voltages[0] = 2800; /* set higher VCORE (2.8V) for Klamath */
+#endif
     hwm_set_values(machine_hwm);
     device_add(&as99127f_device);