diff --git a/auto/bin/parse_xml.py b/auto/bin/parse_xml.py
index 9270040..a9c1b4b 100755
--- a/auto/bin/parse_xml.py
+++ b/auto/bin/parse_xml.py
@@ -93,7 +93,10 @@ def writeExtension(f, name, extension, enums, commands):
         f.write('\t%s %s\n'%(e[0], e[1]))
     commands = [ (j, commands[j]) for j in extension[1] ]
     for c in sorted(commands):
-        f.write('\t%s %s (%s)\n'%(c[1][0], c[0], ', '.join( [ '%s %s'%(j[0], j[1]) for j in c[1][1] ] )))
+        params = ', '.join( [ '%s %s'%(j[0], j[1]) for j in c[1][1] ] )
+        if len(params)==0:
+            params = ' void '
+        f.write('\t%s %s (%s)\n'%(c[1][0], c[0], params))
 
 if __name__ == '__main__':
 
diff --git a/auto/src/eglew_head.h b/auto/src/eglew_head.h
index bb95b1a..adbeb71 100644
--- a/auto/src/eglew_head.h
+++ b/auto/src/eglew_head.h
@@ -66,6 +66,16 @@ typedef khronos_utime_nanoseconds_t EGLuint64NV;
 
 struct EGLClientPixmapHI;
 
+#define EGL_DONT_CARE                     ((EGLint)-1)
+
+#define EGL_NO_CONTEXT                    ((EGLContext)0)
+#define EGL_NO_DISPLAY                    ((EGLDisplay)0)
+#define EGL_NO_IMAGE                      ((EGLImage)0)
+#define EGL_NO_SURFACE                    ((EGLSurface)0)
+#define EGL_NO_SYNC                       ((EGLSync)0)
+
+#define EGL_UNKNOWN                       ((EGLint)-1)
+
 #define EGL_DEFAULT_DISPLAY               ((EGLNativeDisplayType)0)
 
 EGLAPI __eglMustCastToProperFunctionPointerType EGLAPIENTRY eglGetProcAddress (const char *procname);