diff --git a/src/EnergyPlus/VentilatedSlab.cc b/src/EnergyPlus/VentilatedSlab.cc
index 9282967173e..d8626d1846b 100644
--- a/src/EnergyPlus/VentilatedSlab.cc
+++ b/src/EnergyPlus/VentilatedSlab.cc
@@ -305,7 +305,6 @@ namespace VentilatedSlab {
 		using DataPlant::TypeOf_CoilWaterSimpleHeating;
 		using DataPlant::TypeOf_CoilSteamAirHeating;
 		using DataHVACGlobals::ZoneComp;
-		using DataSizing::AutoSize;
 		using DataSizing::ZoneHVACSizing;
 		using DataSizing::NumZoneHVACSizing;