diff --git a/BUILD.md b/BUILD.md
index f46f75c..e3db0c0 100644
--- a/BUILD.md
+++ b/BUILD.md
@@ -88,14 +88,6 @@
   - Ensure the pip module is installed (it should be by default)
   - Need python3.3 or later to get the Windows py.exe launcher that is used to get python3 rather than python2 if both are installed on Windows
   - 32 bit python works
-- Python lxml package must be installed
-  - Download the lxml package from
-        http://www.lfd.uci.edu/~gohlke/pythonlibs/#lxml
-        32-bit latest for Python 3.5 is: lxml-3.5.0-cp35-none-win32.whl
-        64-bit latest for Python 3.5 is: lxml-3.5.0-cp35-none-win_amd64.whl
-  - The package can be installed with pip as follows:
-        pip install lxml-3.5.0-cp35-none-win32.whl
-        If pip is not in your path, you can find it at $PYTHON_HOME\Scripts\pip.exe, where PYTHON_HOME is the folder where you installed Python.
 - Git (from http://git-scm.com/download/win).
   - Note: If you use Cygwin, you can normally use Cygwin's "git.exe".  However, in order to use the "update_external_sources.bat" script, you must have this version.
   - Tell the installer to allow it to be used for "Developer Prompt" as well as "Git Bash".
@@ -175,10 +167,6 @@
 brew install cmake
 brew install python
 brew install python3
-pip install --upgrade pip
-pip install lxml
-pip3.5 install --upgrade pip
-pip3.5 install lxml
 ```
 ### Build steps for Android
 Use the following to ensure the Android build works.
diff --git a/generator.py b/generator.py
index e489b5d..c2ee28e 100644
--- a/generator.py
+++ b/generator.py
@@ -23,7 +23,7 @@
 
 import os,re,sys
 from collections import namedtuple
-from lxml import etree
+import xml.etree.ElementTree as etree
 
 def write( *args, **kwargs ):
     file = kwargs.pop('file',sys.stdout)
@@ -32,7 +32,7 @@
     file.write( end )
 
 # noneStr - returns string argument, or "" if argument is None.
-# Used in converting lxml Elements into text.
+# Used in converting etree Elements into text.
 #   str - string to convert
 def noneStr(str):
     if (str):
@@ -679,7 +679,7 @@
         # For typedefs, add (APIENTRY *<name>) around the name and
         #   use the PFN_cmdnameproc naming convention.
         # Done by walking the tree for <proto> element by element.
-        # lxml.etree has elem.text followed by (elem[i], elem[i].tail)
+        # etree has elem.text followed by (elem[i], elem[i].tail)
         #   for each child element and any following text
         # Leading text
         pdecl += noneStr(proto.text)
@@ -3013,7 +3013,15 @@
                     #if value not in self.stypes:
                     #    print('WARNING: {} is not part of the VkStructureType enumeration [{}]'.format(value, typeName))
                 else:
-                    value = '<ERROR>'
+                    value = typeName
+                    # Remove EXT
+                    value = re.sub('EXT', '', value)
+                    # Add underscore between lowercase then uppercase
+                    value = re.sub('([a-z0-9])([A-Z])', r'\1_\2', value)
+                    # Change to uppercase
+                    value = value.upper()
+                    # Add STRUCTURE_TYPE_
+                    value = re.sub('VK_', 'VK_STRUCTURE_TYPE_', value)
                 # Store the required type value
                 self.structTypes[typeName] = self.StructType(name=name, value=value)
             #
diff --git a/reg.py b/reg.py
index 8be9adf..b10ebac 100755
--- a/reg.py
+++ b/reg.py
@@ -22,7 +22,7 @@
 # MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
 
 import io,os,re,string,sys
-from lxml import etree
+import xml.etree.ElementTree as etree
 
 # matchAPIProfile - returns whether an API and profile
 #   being generated matches an element's profile
@@ -77,7 +77,7 @@
 #   required - should this feature be defined during header generation
 #     (has it been removed by a profile or version)?
 #   declared - has this feature been defined already?
-#   elem - lxml.etree Element for this feature
+#   elem - etree Element for this feature
 #   resetState() - reset required/declared to initial values. Used
 #     prior to generating a new API interface.
 class BaseInfo: