diff --git a/src/Neo.Compiler.CSharp/MethodConvert/System/SystemCall.Char.cs b/src/Neo.Compiler.CSharp/MethodConvert/System/SystemCall.Char.cs
index 048610fba..40107168e 100644
--- a/src/Neo.Compiler.CSharp/MethodConvert/System/SystemCall.Char.cs
+++ b/src/Neo.Compiler.CSharp/MethodConvert/System/SystemCall.Char.cs
@@ -86,9 +86,8 @@ private static void HandleCharIsWhiteSpace(MethodConvert methodConvert, Semantic
         methodConvert.Push((ushort)'\r' + 1);
         methodConvert.AddInstruction(OpCode.WITHIN);
         methodConvert.AddInstruction(OpCode.SWAP);
-        methodConvert.Push((ushort)'\n');
-        methodConvert.Push((ushort)' ' + 1);
-        methodConvert.AddInstruction(OpCode.WITHIN);
+        methodConvert.Push((ushort)' ');
+        methodConvert.AddInstruction(OpCode.NUMEQUAL);
         methodConvert.AddInstruction(OpCode.BOOLOR);
     }
 
diff --git a/tests/Neo.Compiler.CSharp.UnitTests/TestingArtifacts/Contract_Char.cs b/tests/Neo.Compiler.CSharp.UnitTests/TestingArtifacts/Contract_Char.cs
index 853f7a4a4..ef44daa75 100644
--- a/tests/Neo.Compiler.CSharp.UnitTests/TestingArtifacts/Contract_Char.cs
+++ b/tests/Neo.Compiler.CSharp.UnitTests/TestingArtifacts/Contract_Char.cs
@@ -10,12 +10,12 @@ public abstract class Contract_Char(Neo.SmartContract.Testing.SmartContractIniti
 {
     #region Compiled data
 
-    public static Neo.SmartContract.Manifest.ContractManifest Manifest => Neo.SmartContract.Manifest.ContractManifest.Parse(@"{""name"":""Contract_Char"",""groups"":[],""features"":{},""supportedstandards"":[],""abi"":{""methods"":[{""name"":""testCharIsDigit"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":0,""safe"":false},{""name"":""testCharIsLetter"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":10,""safe"":false},{""name"":""testCharIsWhiteSpace"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":28,""safe"":false},{""name"":""testCharIsLetterOrDigit"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":43,""safe"":false},{""name"":""testCharIsLower"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":69,""safe"":false},{""name"":""testCharToLower"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Integer"",""offset"":79,""safe"":false},{""name"":""testCharIsUpper"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":98,""safe"":false},{""name"":""testCharToUpper"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Integer"",""offset"":108,""safe"":false},{""name"":""testCharGetNumericValue"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Integer"",""offset"":127,""safe"":false},{""name"":""testCharIsPunctuation"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":146,""safe"":false},{""name"":""testCharIsSymbol"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":180,""safe"":false},{""name"":""testCharIsControl"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":222,""safe"":false},{""name"":""testCharIsSurrogate"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":240,""safe"":false},{""name"":""testCharIsHighSurrogate"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":270,""safe"":false},{""name"":""testCharIsLowSurrogate"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":286,""safe"":false},{""name"":""testCharIsBetween"",""parameters"":[{""name"":""c"",""type"":""Integer""},{""name"":""lower"",""type"":""Integer""},{""name"":""upper"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":302,""safe"":false}],""events"":[]},""permissions"":[],""trusts"":[],""extra"":{""nef"":{""optimization"":""All""}}}");
+    public static Neo.SmartContract.Manifest.ContractManifest Manifest => Neo.SmartContract.Manifest.ContractManifest.Parse(@"{""name"":""Contract_Char"",""groups"":[],""features"":{},""supportedstandards"":[],""abi"":{""methods"":[{""name"":""testCharIsDigit"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":0,""safe"":false},{""name"":""testCharIsLetter"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":10,""safe"":false},{""name"":""testCharIsWhiteSpace"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":28,""safe"":false},{""name"":""testCharIsLetterOrDigit"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":42,""safe"":false},{""name"":""testCharIsLower"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":68,""safe"":false},{""name"":""testCharToLower"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Integer"",""offset"":78,""safe"":false},{""name"":""testCharIsUpper"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":97,""safe"":false},{""name"":""testCharToUpper"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Integer"",""offset"":107,""safe"":false},{""name"":""testCharGetNumericValue"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Integer"",""offset"":126,""safe"":false},{""name"":""testCharIsPunctuation"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":145,""safe"":false},{""name"":""testCharIsSymbol"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":179,""safe"":false},{""name"":""testCharIsControl"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":221,""safe"":false},{""name"":""testCharIsSurrogate"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":239,""safe"":false},{""name"":""testCharIsHighSurrogate"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":269,""safe"":false},{""name"":""testCharIsLowSurrogate"",""parameters"":[{""name"":""c"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":285,""safe"":false},{""name"":""testCharIsBetween"",""parameters"":[{""name"":""c"",""type"":""Integer""},{""name"":""lower"",""type"":""Integer""},{""name"":""upper"",""type"":""Integer""}],""returntype"":""Boolean"",""offset"":301,""safe"":false}],""events"":[]},""permissions"":[],""trusts"":[],""extra"":{""nef"":{""optimization"":""All""}}}");
 
     /// <summary>
     /// Optimization: "All"
     /// </summary>
-    public static Neo.SmartContract.NefFile Nef => Neo.IO.Helper.AsSerializable<Neo.SmartContract.NefFile>(Convert.FromBase64String(@"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"));
+    public static Neo.SmartContract.NefFile Nef => Neo.IO.Helper.AsSerializable<Neo.SmartContract.NefFile>(Convert.FromBase64String(@"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"));
 
     #endregion
 
diff --git a/tests/Neo.Compiler.CSharp.UnitTests/UnitTest_Char.cs b/tests/Neo.Compiler.CSharp.UnitTests/UnitTest_Char.cs
index 76b52ed32..bfa8399f1 100644
--- a/tests/Neo.Compiler.CSharp.UnitTests/UnitTest_Char.cs
+++ b/tests/Neo.Compiler.CSharp.UnitTests/UnitTest_Char.cs
@@ -18,6 +18,7 @@ public class UnitTest_Char : DebugAndTestBase<Contract_Char>
                 new object[] { '\t', false, false, true, false, false },
                 new object[] { '$', false, false, false, false, false },
                 new object[] { '\n', false, false, true, false, false },
+                new object[] { '\x1f', false, false, false, false, false },
             };
 
         [TestMethod]