diff --git a/OpenXmlFormats/Spreadsheet/Sheet.cs b/OpenXmlFormats/Spreadsheet/Sheet.cs
index e96aa1621..ab36b4473 100644
--- a/OpenXmlFormats/Spreadsheet/Sheet.cs
+++ b/OpenXmlFormats/Spreadsheet/Sheet.cs
@@ -7387,6 +7387,33 @@ public void Set(CT_DataValidation obj)
             promptField = obj.promptField;
             sqrefField = obj.sqrefField;
         }
+
+        public override bool Equals(object obj)
+        {
+            CT_DataValidation o = (CT_DataValidation)obj;
+
+            if (o is null)
+            {
+                return false;
+            }
+
+            return formula1Field == o.formula1Field
+                && formula2Field == o.formula2Field
+                && typeField == o.typeField
+                && errorStyleField == o.errorStyleField
+                && imeModeField == o.imeModeField
+                && operatorField == o.operatorField
+                && allowBlankField == o.allowBlankField
+                && showDropDownField == o.showDropDownField
+                && showInputMessageField == o.showInputMessageField
+                && showErrorMessageField == o.showErrorMessageField
+                && errorTitleField == o.errorTitleField
+                && errorField == o.errorField
+                && promptTitleField == o.promptTitleField
+                && promptField == o.promptField
+                && sqrefField == o.sqrefField;
+        }
+
         [XmlElement(Order = 0)]
         public string formula1
         {
diff --git a/main/HSSF/Record/DVRecord.cs b/main/HSSF/Record/DVRecord.cs
index bda26c9c8..dda005113 100644
--- a/main/HSSF/Record/DVRecord.cs
+++ b/main/HSSF/Record/DVRecord.cs
@@ -185,7 +185,36 @@ public int DataType
             set { this._option_flags = this.opt_data_type.SetValue(this._option_flags, value); }
         }
 
+        public override bool Equals(object obj)
+        {
+            if (obj == null || !(obj is DVRecord))
+            {
+                return false;
+            }
 
+            DVRecord dv = (DVRecord)obj;
+            return DataType == dv.DataType
+                && ErrorStyle == dv.ErrorStyle
+                && EmptyCellAllowed == dv.EmptyCellAllowed
+                && ShowErrorOnInvalidValue == dv.ShowErrorOnInvalidValue
+                && ShowPromptOnCellSelected == dv.ShowPromptOnCellSelected
+                && SuppressDropdownArrow == dv.SuppressDropdownArrow
+                && ListExplicitFormula == dv.ListExplicitFormula
+                && ConditionOperator == dv.ConditionOperator
+                && PromptTitle == dv.PromptTitle
+                && PromptText == dv.PromptText
+                && ErrorTitle == dv.ErrorTitle
+                && ErrorText == dv.ErrorText
+                && ((Formula1 == null && dv.Formula1 == null) 
+                    || Formula1 != null && dv.Formula1 != null 
+                    && Formula1.ToString() == dv.Formula1.ToString())
+                && ((Formula2 == null && dv.Formula2 == null) 
+                    || Formula2 != null && dv.Formula2 != null 
+                    && Formula2.ToString() == dv.Formula2.ToString())
+                && (CellRangeAddress == null && dv.CellRangeAddress == null
+                    || CellRangeAddress != null && dv.CellRangeAddress != null 
+                    && CellRangeAddress.ToString() == dv.CellRangeAddress.ToString());
+        }
 
         /**
          * Get the condition error style
@@ -426,4 +455,4 @@ public override Object Clone()
             return CloneViaReserialise();
         }
     }
-}
\ No newline at end of file
+}