diff --git a/ClosedXML/Excel/CalcEngine/Functions/MathTrig.cs b/ClosedXML/Excel/CalcEngine/Functions/MathTrig.cs
index 8111c18..7fc00f2 100644
--- a/ClosedXML/Excel/CalcEngine/Functions/MathTrig.cs
+++ b/ClosedXML/Excel/CalcEngine/Functions/MathTrig.cs
@@ -118,7 +118,7 @@
 
         private static object Csch(List<Expression> p)
         {
-            if (p[0].Evaluate().Equals(0))
+            if (p[0].Evaluate().Equals(0.0))
             {
                 return ErrorExpression.ExpressionErrorType.DivisionByZero;
             }
diff --git a/ClosedXML_Tests/Excel/CalcEngine/MathTrigTests.cs b/ClosedXML_Tests/Excel/CalcEngine/MathTrigTests.cs
index 0c0b33a..b8406cd 100644
--- a/ClosedXML_Tests/Excel/CalcEngine/MathTrigTests.cs
+++ b/ClosedXML_Tests/Excel/CalcEngine/MathTrigTests.cs
@@ -163,13 +163,13 @@
         }
 
         [Test]
-        public void Csh_ReturnsDivisionByZeroErrorOnInput0()
+        public void Csch_ReturnsDivisionByZeroErrorOnInput0()
         {
             using (var wb = new XLWorkbook())
             {
                 var ws = wb.AddWorksheet("Sheet1");
                 ws.FirstCell().Value = 0;
-                Assert.AreEqual(ErrorExpression.ExpressionErrorType.DivisionByZero, ws.Evaluate("CSH(A1)"));
+                Assert.AreEqual(ErrorExpression.ExpressionErrorType.DivisionByZero, ws.Evaluate("CSCH(A1)"));
             }
         }
     }