diff --git a/Google.Protobuf/IMessage.vb b/Google.Protobuf/IMessage.vb
index 75a07a2..eb3f0b3 100644
--- a/Google.Protobuf/IMessage.vb
+++ b/Google.Protobuf/IMessage.vb
@@ -67,19 +67,4 @@ Namespace Google.Protobuf
         ReadOnly Property Descriptor As MessageDescriptor
     End Interface
 
-    ''' <summary>
-    ''' Generic interface for a Protocol Buffers message,
-    ''' where the type parameter is expected to be the same type as
-    ''' the implementation class.
-    ''' </summary>
-    ''' <typeparam name="T">The message type.</typeparam>
-    Public Interface IMessageType(Of T As IMessageType(Of T))
-        Inherits IMessage, IEquatable(Of T), IDeepCloneable(Of T)
-        ''' <summary>
-        ''' Merges the given message into this one.
-        ''' </summary>
-        ''' <remarks>See the user guide for precise merge semantics.</remarks>
-        ''' <param name="message">The message to merge with this one. Must not be null.</param>
-        Overloads Sub MergeFrom(message As T)
-    End Interface
 End Namespace
diff --git a/Google.Protobuf/IMessageType.vb b/Google.Protobuf/IMessageType.vb
new file mode 100644
index 0000000..74ea314
--- /dev/null
+++ b/Google.Protobuf/IMessageType.vb
@@ -0,0 +1,18 @@
+Namespace Google.Protobuf
+
+    ''' <summary>
+    ''' Generic interface for a Protocol Buffers message,
+    ''' where the type parameter is expected to be the same type as
+    ''' the implementation class.
+    ''' </summary>
+    ''' <typeparam name="T">The message type.</typeparam>
+    Public Interface IMessageType(Of T As IMessageType(Of T))
+        Inherits IMessage, IEquatable(Of T), IDeepCloneable(Of T)
+        ''' <summary>
+        ''' Merges the given message into this one.
+        ''' </summary>
+        ''' <remarks>See the user guide for precise merge semantics.</remarks>
+        ''' <param name="message">The message to merge with this one. Must not be null.</param>
+        Overloads Sub MergeFrom(message As T)
+    End Interface
+End Namespace
\ No newline at end of file