diff --git a/Compras/Compras.aspx.vb b/Compras/Compras.aspx.vb
index 6bd9eb977..074431106 100644
--- a/Compras/Compras.aspx.vb
+++ b/Compras/Compras.aspx.vb
@@ -9350,7 +9350,7 @@ Partial Class Compras_Compras
 
                                 Dim CvePersonal As Integer = 0
                                 If Cont < GvPersonal.Rows.Count Then CvePersonal = GvPersonal.Rows(Cont).FCDropDownList("DdlPersonalGv").SelectedValue.ToEntero
-                                Dim Referencia As String
+                                Dim Referencia As String = ""
                                 If Cont < GvPersonal.Rows.Count Then Referencia = GvPersonal.Rows(Cont).FCTextBox("TxtReferencia").Text
 
                                 Cont = Cont + 1