diff --git a/__test__/mocks/mathmlStrings.ts b/__test__/mocks/mathmlStrings.ts
index b97a5ea..b3b97db 100755
--- a/__test__/mocks/mathmlStrings.ts
+++ b/__test__/mocks/mathmlStrings.ts
@@ -26,10 +26,20 @@ export const mfencedWithSeparatorAttribute = `
 </root>
 `;
 
-export const mfencedWithBrokenAttribute = `
+export const mfencedWithBrokenAttributeCase1 = `
 <root>
   <math>
-  <mfenced open='{' close >
+  <mfenced open='{' close  >
+    <mn>3</mn>
+  </mfenced>
+  </math>
+</root>
+`;
+
+export const mfencedWithBrokenAttributeCase2 = `
+<root>
+  <math>
+  <mfenced open='{' close= >
     <mn>3</mn>
   </mfenced>
   </math>
diff --git a/src/infra/usecases/xmldom-to-mathml-elements/error-handler.ts b/src/infra/usecases/xmldom-to-mathml-elements/error-handler.ts
index 2b90414..cba95d4 100644
--- a/src/infra/usecases/xmldom-to-mathml-elements/error-handler.ts
+++ b/src/infra/usecases/xmldom-to-mathml-elements/error-handler.ts
@@ -9,16 +9,33 @@ export class ErrorHandler {
     return this._fixMissingAttribute(errorMessage, xml);
   }
 
-  private _fixMissingAttribute(errorMessage: string, xml: string): string {
-    const missingAttribute = errorMessage.split('"')[1];
-    return xml.replace(this._matchAttribute(missingAttribute), `${missingAttribute}='null'`);
+  isThereAnyErrors(): boolean {
+    return this._errors.length > 0;
   }
 
-  private _matchAttribute(attribute: string): RegExp {
-    return new RegExp(`(?<=\<.*)(${attribute}=(?!(\"|\')))|(${attribute}(?!(\"|\')))(?=.*\>)`, 'g');
+  cleanErrors(): void {
+    this._errors = [];
+  }
+
+  private _fixMissingAttribute(errorMessage: string, xml: string): string {
+    const missingAttribute = errorMessage.split('"')[1];
+    if (missingAttribute) return xml.replace(this._matchMissingValueForAttribute(missingAttribute), '');
+
+    return xml.replace(this._mathGenericMissingValue(), '');
+  }
+
+  private _matchMissingValueForAttribute(attribute: string): RegExp {
+    return new RegExp(`(?<=\<.*)(${attribute}=(?!(\"|\')))|(${attribute}(?!(\"|\')))(?=.*\>)`, 'gm');
+  }
+
+  private _mathGenericMissingValue(): RegExp {
+    return /(?<=\<.*)(\w+=(?!(\"|\')))/gm;
   }
 
   private _isMissingAttributeValueError(errorMessage: string): boolean {
-    return !!errorMessage.includes('attribute') && !!errorMessage.includes('missed');
+    return (
+      (!!errorMessage.includes('attribute') && !!errorMessage.includes('missed')) ||
+      errorMessage.includes('attribute value missed')
+    );
   }
 }
diff --git a/src/infra/usecases/xmldom-to-mathml-elements/xmldom-to-mathml-element-adapter.ts b/src/infra/usecases/xmldom-to-mathml-elements/xmldom-to-mathml-element-adapter.ts
index ecfea2e..872bdb7 100644
--- a/src/infra/usecases/xmldom-to-mathml-elements/xmldom-to-mathml-element-adapter.ts
+++ b/src/infra/usecases/xmldom-to-mathml-elements/xmldom-to-mathml-element-adapter.ts
@@ -23,6 +23,7 @@ export class XmlToMathMLAdapter {
 
   convert(xml: string): MathMLElement[] {
     this._xml = this._removeLineBreaks(xml);
+
     return this._elementsConvertor.convert(this._mathMLElements);
   }
 
@@ -36,7 +37,12 @@ export class XmlToMathMLAdapter {
   }
 
   private get _mathMLElements(): Element[] {
-    const elements = this._xmlDOM.parseFromString(this._xml).getElementsByTagName('math');
+    let elements = this._xmlDOM.parseFromString(this._xml).getElementsByTagName('math');
+    if (this._errorHandler.isThereAnyErrors()) {
+      this._errorHandler.cleanErrors();
+      elements = this._xmlDOM.parseFromString(this._xml).getElementsByTagName('math');
+    }
+
     return Array.from(elements) as Element[];
   }
 }