diff --git a/History.md b/History.md
index cdd3208c..d501ba69 100644
--- a/History.md
+++ b/History.md
@@ -12,6 +12,8 @@
 - #855
 - #874
 - #876/830
+- #878
+- corrected typo ArithmetricException to ArithmeticException 
 
 2.17.0
 =======
diff --git a/library/src/main/java/org/mustangproject/Exceptions/ArithmeticException.java b/library/src/main/java/org/mustangproject/Exceptions/ArithmeticException.java
index f2341e1a..d0679073 100644
--- a/library/src/main/java/org/mustangproject/Exceptions/ArithmeticException.java
+++ b/library/src/main/java/org/mustangproject/Exceptions/ArithmeticException.java
@@ -4,13 +4,14 @@ import java.text.ParseException;
 
 /***
  * will be thrown if an invoice cant be reproduced numerically
+ * ArithmetricException for backwards compatibility, was a spelling error
  */
 public class ArithmeticException extends ArithmetricException {
 	public ArithmeticException() {
-		this("");
+		super();
 	}
 
 	public ArithmeticException(String details) {
-//		super("Could not reproduce the invoice. " + details, 0);
+		super(details);
 	}
 }
diff --git a/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDInvoiceImporter.java b/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDInvoiceImporter.java
index a8ec32ed..4cb47c4a 100644
--- a/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDInvoiceImporter.java
+++ b/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDInvoiceImporter.java
@@ -10,7 +10,6 @@ import org.apache.pdfbox.pdmodel.common.PDNameTreeNode;
 import org.apache.pdfbox.pdmodel.common.filespecification.PDComplexFileSpecification;
 import org.apache.pdfbox.pdmodel.common.filespecification.PDEmbeddedFile;
 import org.mustangproject.*;
-import org.mustangproject.Exceptions.ArithmetricException;
 import org.mustangproject.Exceptions.StructureException;
 import org.mustangproject.util.NodeMap;
 import org.slf4j.Logger;
@@ -1096,7 +1095,7 @@ public class ZUGFeRDInvoiceImporter {
 							.collect(Collectors.joining(" + "));
 					} catch (Exception ignored) {
 					}
-					throw new ArithmetricException("Payable total in XML is " + payableTotalFromXml + ", but calculated total is " + calculatedPayableTotal + moreDetails);
+					throw new ArithmeticException("Payable total in XML is " + payableTotalFromXml + ", but calculated total is " + calculatedPayableTotal + moreDetails);
 				}
 			}
 		}
diff --git a/validator/src/main/java/org/mustangproject/validator/XMLValidator.java b/validator/src/main/java/org/mustangproject/validator/XMLValidator.java
index 3f737947..ccd57b3a 100644
--- a/validator/src/main/java/org/mustangproject/validator/XMLValidator.java
+++ b/validator/src/main/java/org/mustangproject/validator/XMLValidator.java
@@ -24,8 +24,6 @@ import javax.xml.xpath.XPathFactory;
 import org.mustangproject.CalculatedInvoice;
 import org.mustangproject.Exceptions.ArithmetricException;
 import org.mustangproject.XMLTools;
-import org.mustangproject.ZUGFeRD.TransactionCalculator;
-import org.mustangproject.ZUGFeRD.ZUGFeRDImporter;
 import org.mustangproject.ZUGFeRD.ZUGFeRDInvoiceImporter;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -393,7 +391,7 @@ public class XMLValidator extends Validator {
 						}
 					}
 				}
-				checkArithmetrics(context);
+				checkArithmetics(context);
 
 
 			} catch (final IrrecoverableValidationError er) {
@@ -417,14 +415,14 @@ public class XMLValidator extends Validator {
 
 	}
 
-	private void checkArithmetrics(ValidationContext context) {
+	private void checkArithmetics(ValidationContext context) {
 		ZUGFeRDInvoiceImporter zi=new ZUGFeRDInvoiceImporter();
 		try {
 			zi.fromXML(zfXML);
 			CalculatedInvoice ci=new CalculatedInvoice();
 			zi.extractInto(ci);
 
-		} catch ( ArithmetricException e) {
+		} catch ( ArithmeticException e) {
 			try {
 				context.addResultItem(new ValidationResultItem(ESeverity.warning, "Arithmetical issue:"+e.getMessage()).setSection(10));
 
diff --git a/validator/src/test/java/org/mustangproject/validator/XMLValidatorTest.java b/validator/src/test/java/org/mustangproject/validator/XMLValidatorTest.java
index e3636261..5bb8d1d9 100644
--- a/validator/src/test/java/org/mustangproject/validator/XMLValidatorTest.java
+++ b/validator/src/test/java/org/mustangproject/validator/XMLValidatorTest.java
@@ -284,12 +284,12 @@ public class XMLValidatorTest extends ResourceCase {
 
 	}
 
-	public void testArithmetrics() {
+	public void testArithmetics() {
 		final ValidationContext ctx = new ValidationContext(null);
 		final XMLValidator xv = new XMLValidator(ctx);
 		final XPathEngine xpath = new JAXPXPathEngine();
 
-		File tempFile = getResourceAsFile("invalidArithmetrics.xml");
+		File tempFile = getResourceAsFile("invalidArithmetics.xml");
 		try {
 			xv.setFilename(tempFile.getAbsolutePath());
 			xv.validate();
diff --git a/validator/src/test/resources/invalidArithmetrics.xml b/validator/src/test/resources/invalidArithmetics.xml
similarity index 97%
rename from validator/src/test/resources/invalidArithmetrics.xml
rename to validator/src/test/resources/invalidArithmetics.xml
index e32358f0..3986c2d3 100644
--- a/validator/src/test/resources/invalidArithmetrics.xml
+++ b/validator/src/test/resources/invalidArithmetics.xml
@@ -22,11 +22,11 @@
 			<ram:SpecifiedLineTradeAgreement>
 				<ram:GrossPriceProductTradePrice>
 					<ram:ChargeAmount>160.0000</ram:ChargeAmount>
-					<ram:BasisQuantity unitCode="HUR">2.0000</ram:BasisQuantity>
+					<ram:BasisQuantity unitCode="HUR">1.0000</ram:BasisQuantity>
 				</ram:GrossPriceProductTradePrice>
 				<ram:NetPriceProductTradePrice>
 					<ram:ChargeAmount>160.0000</ram:ChargeAmount>
-					<ram:BasisQuantity unitCode="HUR">2.0000</ram:BasisQuantity>
+					<ram:BasisQuantity unitCode="HUR">1.0000</ram:BasisQuantity>
 				</ram:NetPriceProductTradePrice>
 			</ram:SpecifiedLineTradeAgreement>
 			<ram:SpecifiedLineTradeDelivery>
@@ -179,7 +179,7 @@
 				<ram:TaxBasisTotalAmount>496.00</ram:TaxBasisTotalAmount>
 				<ram:TaxTotalAmount currencyID="EUR">75.04</ram:TaxTotalAmount>
 				<ram:GrandTotalAmount>571.04</ram:GrandTotalAmount>
-				<ram:DuePayableAmount>571.05</ram:DuePayableAmount>
+				<ram:DuePayableAmount>571.04</ram:DuePayableAmount>
 			</ram:SpecifiedTradeSettlementHeaderMonetarySummation>
 		</ram:ApplicableHeaderTradeSettlement>
 	</rsm:SupplyChainTradeTransaction>