diff --git a/Microsoft.Diagnostics.Runtime/CLRMD/ClrMemDiag/Desktop/types.cs b/Microsoft.Diagnostics.Runtime/CLRMD/ClrMemDiag/Desktop/types.cs
index 2e5f715..3f8b64e 100644
--- a/Microsoft.Diagnostics.Runtime/CLRMD/ClrMemDiag/Desktop/types.cs
+++ b/Microsoft.Diagnostics.Runtime/CLRMD/ClrMemDiag/Desktop/types.cs
@@ -145,7 +145,7 @@ ClrInterface GetInterface(IMetadata import, int mdIFace)
                     name = builder.ToString();
             }
 
-            if (!m_heap.m_interfaces.TryGetValue(name, out result))
+            if (name != null && !m_heap.m_interfaces.TryGetValue(name, out result))
             {
                 ClrInterface type = null;
                 if (extends != 0 && extends != 0x01000000)
diff --git a/Microsoft.Diagnostics.Runtime/CLRMD/ClrMemDiag/datatargetimpl.cs b/Microsoft.Diagnostics.Runtime/CLRMD/ClrMemDiag/datatargetimpl.cs
index 4bd6e05..9d7a89a 100644
--- a/Microsoft.Diagnostics.Runtime/CLRMD/ClrMemDiag/datatargetimpl.cs
+++ b/Microsoft.Diagnostics.Runtime/CLRMD/ClrMemDiag/datatargetimpl.cs
@@ -197,7 +197,7 @@ public override ClrRuntime CreateRuntime(string dacFilename)
             }
             else if (major == 4)
             {
-                if (patch < 10000)
+                if (minor < 6 && patch < 10000)
                     ver = DesktopVersion.v4;
                 else
                     return new V45Runtime(this, lib);