diff --git a/VECTO/Input Files/Gearbox.vb b/VECTO/Input Files/Gearbox.vb
index dfaa82cda6bdbe13af38d781bdb5d2ba8ecc1678..8c28f60e674bebfa605476fe875708a3e12f19ee 100644
--- a/VECTO/Input Files/Gearbox.vb	
+++ b/VECTO/Input Files/Gearbox.vb	
@@ -708,6 +708,13 @@ Public Class Gearbox
         Return Nothing
     End Get
     End Property
+
+    Public ReadOnly Property PEV_DownshiftSpeedFactor As Double? Implements IGearshiftEngineeringInputData.PEV_DownshiftSpeedFactor
+        get
+            return nothing
+        End Get
+    End Property
+
     Public ReadOnly Property PEV_DeRatingDownshiftSpeedFactor As Double? Implements IGearshiftEngineeringInputData.PEV_DeRatingDownshiftSpeedFactor
     get
         return Nothing