diff --git a/src/IKVM.Reflection/Writer/GuidHeap.cs b/src/IKVM.Reflection/Writer/GuidHeap.cs
index 68c8ab2eca..21d3915410 100644
--- a/src/IKVM.Reflection/Writer/GuidHeap.cs
+++ b/src/IKVM.Reflection/Writer/GuidHeap.cs
@@ -38,6 +38,7 @@ sealed class GuidHeap : SimpleHeap
         /// </summary>
         internal GuidHeap()
         {
+
         }
 
         internal int Add(Guid guid)
diff --git a/src/IKVM.Reflection/Writer/IMAGE_OPTIONAL_HEADER.cs b/src/IKVM.Reflection/Writer/IMAGE_OPTIONAL_HEADER.cs
index 8bfb43459d..3a52a4df71 100644
--- a/src/IKVM.Reflection/Writer/IMAGE_OPTIONAL_HEADER.cs
+++ b/src/IKVM.Reflection/Writer/IMAGE_OPTIONAL_HEADER.cs
@@ -23,9 +23,10 @@ Jeroen Frijters
 */
 using System.IO;
 
+using IKVM.Reflection.Reader;
+
 using BYTE = System.Byte;
 using DWORD = System.UInt32;
-using IMAGE_DATA_DIRECTORY = IKVM.Reflection.Reader.IMAGE_DATA_DIRECTORY;
 using ULONGLONG = System.UInt64;
 using WORD = System.UInt16;