diff --git a/HRM.DA/DA/Salary/SalaryProcessDA.cs b/HRM.DA/DA/Salary/SalaryProcessDA.cs
index 271602f..3c28259 100644
--- a/HRM.DA/DA/Salary/SalaryProcessDA.cs
+++ b/HRM.DA/DA/Salary/SalaryProcessDA.cs
@@ -120,7 +120,7 @@ namespace HRM.DA
             object obj =
                 tc.ExecuteScalar("Select SALARYPROCESSID from SALARYPROCESS where SALARYMONTH=%d AND PAYROLLTYPEID=%n",
                     dSMonth, payrollTypeID);
-            if (obj == DBNull.Value) return false;
+            if (obj == DBNull.Value || obj == null) return false;
             else bShowInDesktop=true;
             return bShowInDesktop;
         }