diff --git a/classes/phosphor-pid-control.bbclass b/classes/phosphor-pid-control.bbclass
new file mode 100644
index 0000000..573420b
--- /dev/null
+++ b/classes/phosphor-pid-control.bbclass
@@ -0,0 +1,2 @@
+sensor_datadir="${datadir}/swampd/sensor"
+