diff --git a/src/Main/Base/Project/Src/Services/MimeTypeDetection.cs b/src/Main/Base/Project/Src/Services/MimeTypeDetection.cs
index e5a8684b3d..37e4a49da0 100644
--- a/src/Main/Base/Project/Src/Services/MimeTypeDetection.cs
+++ b/src/Main/Base/Project/Src/Services/MimeTypeDetection.cs
@@ -53,6 +53,7 @@ namespace ICSharpCode.SharpDevelop
 							reader = new StreamReader(stream, Encoding.UTF8);
 							break;
 						} else {
+							stream.Position = 0;
 							byte[] buffer = new byte[BUFFER_SIZE];
 							int length = stream.Read(buffer, 0, BUFFER_SIZE);
 							return FindMimeType(buffer, 0, length);
diff --git a/src/Main/Base/Test/ICSharpCode.SharpDevelop.Tests.csproj b/src/Main/Base/Test/ICSharpCode.SharpDevelop.Tests.csproj
index 18bdd2d84d..7d59390954 100644
--- a/src/Main/Base/Test/ICSharpCode.SharpDevelop.Tests.csproj
+++ b/src/Main/Base/Test/ICSharpCode.SharpDevelop.Tests.csproj
@@ -204,5 +204,8 @@
     <EmbeddedResource Include="mime_utf-16_be_test.txt" />
     <EmbeddedResource Include="mime_utf-16_le_test.txt" />
   </ItemGroup>
+  <ItemGroup>
+    <EmbeddedResource Include="mime_bug1.txt" />
+  </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSHARP.Targets" />
 </Project>
\ No newline at end of file
diff --git a/src/Main/Base/Test/MimeDetectionTests.cs b/src/Main/Base/Test/MimeDetectionTests.cs
index 12f612642d..afaf84889e 100644
--- a/src/Main/Base/Test/MimeDetectionTests.cs
+++ b/src/Main/Base/Test/MimeDetectionTests.cs
@@ -54,6 +54,7 @@ namespace ICSharpCode.SharpDevelop.Tests
 		{
 			TestMime(LoadFile("ICSharpCode.SharpDevelop.Tests.mime_utf-16_be_test.txt"), "text/plain");
 			TestMime(LoadFile("ICSharpCode.SharpDevelop.Tests.mime_utf-16_le_test.txt"), "text/plain");
+			TestMime(LoadFile("ICSharpCode.SharpDevelop.Tests.mime_bug1.txt"), "text/plain");
 		}
 		
 		byte[] LoadFile(string resourceName)
diff --git a/src/Main/Base/Test/mime_bug1.txt b/src/Main/Base/Test/mime_bug1.txt
new file mode 100644
index 0000000000..2887279105
--- /dev/null
+++ b/src/Main/Base/Test/mime_bug1.txt
@@ -0,0 +1 @@
+1°
\ No newline at end of file