diff --git a/AgroBase/AgroBase/Models/Operacoes/OperacaoModel.cs b/AgroBase/AgroBase/Models/Operacoes/OperacaoModel.cs
index 62f6b5891..49623da2e 100644
--- a/AgroBase/AgroBase/Models/Operacoes/OperacaoModel.cs
+++ b/AgroBase/AgroBase/Models/Operacoes/OperacaoModel.cs
@@ -4916,7 +4916,7 @@ namespace AgroBase.Models
         {
             if (op == null) return;
 
-            if (!ReferenceEquals(Variaveis.OperacaoEmAndamento, op))
+            if (Variaveis.OperacaoEmAndamento != null && !ReferenceEquals(Variaveis.OperacaoEmAndamento, op))
                 op = Variaveis.OperacaoEmAndamento;
 
             DateTime agora = DateTime.Now;