diff --git a/src/CsvHelper/Configuration/ConfigurationFunctions.cs b/src/CsvHelper/Configuration/ConfigurationFunctions.cs
index 99ed29616..282f6b60b 100644
--- a/src/CsvHelper/Configuration/ConfigurationFunctions.cs
+++ b/src/CsvHelper/Configuration/ConfigurationFunctions.cs
@@ -209,7 +209,7 @@ public static string GetDelimiter(GetDelimiterArgs args)
 			var match = Regex.Match(text, newLine);
 			var line = match.Success ? text.Substring(0, match.Index) : text;
 
-			if (line.Length > 0)
+			if (line.Length > 0 && !(config.AllowComments && line[0] == config.Comment))
 			{
 				var delimiterCounts = new Dictionary<string, int>();
 				foreach (var delimiter in config.DetectDelimiterValues)
diff --git a/tests/CsvHelper.Tests/Parsing/DetectDelimiterTests.cs b/tests/CsvHelper.Tests/Parsing/DetectDelimiterTests.cs
index 91c51c4bb..bd40a3ef2 100644
--- a/tests/CsvHelper.Tests/Parsing/DetectDelimiterTests.cs
+++ b/tests/CsvHelper.Tests/Parsing/DetectDelimiterTests.cs
@@ -303,5 +303,21 @@ public void GetDelimiter_TextHasEmptyLines_DetectsDelimiter()
 			var delimeter = ConfigurationFunctions.GetDelimiter(new Delegates.GetDelimiterArgs(s.ToString(), config));
 			Assert.Equal(";", delimeter);
 		}
+
+		[Fact]
+		public void GetDelimiter_TextHasComments_DetectsDelimiter()
+		{
+			var s = new StringBuilder();
+			s.AppendLine("#comment,,,");
+			s.AppendLine("Id;Name");
+			s.AppendLine("1;2");
+			var config = new CsvConfiguration(CultureInfo.InvariantCulture)
+			{
+				AllowComments = true,
+				Comment = '#',
+				DetectDelimiter = true,
+			};
+			Assert.Equal(";", ConfigurationFunctions.GetDelimiter(new Delegates.GetDelimiterArgs(s.ToString(), config)));
+		}
 	}
 }