diff --git a/src/ColumnizerLib.UnitTests/ColumnizerLib.UnitTests.csproj b/src/ColumnizerLib.UnitTests/ColumnizerLib.UnitTests.csproj
index 120fd833..21422e20 100644
--- a/src/ColumnizerLib.UnitTests/ColumnizerLib.UnitTests.csproj
+++ b/src/ColumnizerLib.UnitTests/ColumnizerLib.UnitTests.csproj
@@ -46,6 +46,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="ColumnTests.cs" />
+    <Compile Include="Extensions\LogLineExtensionsTests.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
   <ItemGroup>
diff --git a/src/ColumnizerLib.UnitTests/Extensions/LogLineExtensionsTests.cs b/src/ColumnizerLib.UnitTests/Extensions/LogLineExtensionsTests.cs
new file mode 100644
index 00000000..013b9f61
--- /dev/null
+++ b/src/ColumnizerLib.UnitTests/Extensions/LogLineExtensionsTests.cs
@@ -0,0 +1,31 @@
+using LogExpert;
+using NUnit.Framework;
+
+namespace ColumnizerLib.UnitTests.Extensions
+{
+    [TestFixture]
+
+    internal class LogLineExtensionsTests
+    {
+        private class TestingLogLine : ILogLine
+        {
+            public string FullLine { get; set; }
+
+            public int LineNumber { get; set; }
+
+            public string Text { get; set; }
+        }
+
+        [Test]
+        public void ToClipBoardText_ReturnsExpected()
+        {
+            var underTest = new TestingLogLine
+            {
+                FullLine = "a fullLine",
+                LineNumber = 89,
+                Text = "a text"
+            };
+            Assert.AreEqual("\t90\ta fullLine", underTest.ToClipBoardText());
+        }
+    }
+}
diff --git a/src/ColumnizerLib/ColumnizerLib.csproj b/src/ColumnizerLib/ColumnizerLib.csproj
index 182f38ae..cc7cccd0 100644
--- a/src/ColumnizerLib/ColumnizerLib.csproj
+++ b/src/ColumnizerLib/ColumnizerLib.csproj
@@ -57,6 +57,7 @@
     </Compile>
     <Compile Include="Column.cs" />
     <Compile Include="ColumnizedLogLine.cs" />
+    <Compile Include="Extensions\LogLineExtensions.cs" />
     <Compile Include="IAutoLogLineColumnizerCallback.cs" />
     <Compile Include="IColumn.cs" />
     <Compile Include="IColumnizerConfigurator.cs" />
diff --git a/src/ColumnizerLib/Extensions/LogLineExtensions.cs b/src/ColumnizerLib/Extensions/LogLineExtensions.cs
new file mode 100644
index 00000000..01400ea4
--- /dev/null
+++ b/src/ColumnizerLib/Extensions/LogLineExtensions.cs
@@ -0,0 +1,10 @@
+namespace LogExpert
+{
+    public static class LogLineExtensions
+    {
+        public static string ToClipBoardText(this ILogLine logLine)
+        {
+            return "\t" + (logLine.LineNumber + 1).ToString() + "\t" + logLine.FullLine;
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/LogExpert/Controls/LogWindow/LogWindowPrivate.cs b/src/LogExpert/Controls/LogWindow/LogWindowPrivate.cs
index 2bc1d4e2..0fd5d1f6 100644
--- a/src/LogExpert/Controls/LogWindow/LogWindowPrivate.cs
+++ b/src/LogExpert/Controls/LogWindow/LogWindowPrivate.cs
@@ -2873,7 +2873,7 @@ private void CopyMarkedLinesToClipboard()
                         line = xmlColumnizer.GetLineTextForClipboard(line, callback);
                     }
 
-                    clipText.AppendLine(line.FullLine);
+                    clipText.AppendLine(line.ToClipBoardText());
                 }
 
                 Clipboard.SetText(clipText.ToString());