diff --git a/geo.py b/geo.py
index b8e6684..f2029a3 100755
--- a/geo.py
+++ b/geo.py
@@ -846,6 +846,10 @@ class Model:
         self.header_data += struct.pack("<fff", *self.autolod_dists)
         self.header_data += struct.pack("<h", self.id)
 
+        if self.geo.version >= 8:
+            #Pad to match the alignment of "ModelFormatOnDisk_v8" produced by "GetVrml/output.c"
+            self.header_data += struct.pack("<h", 0)
+
         self.header_data = struct.pack("<i", len(self.header_data) + 4) + self.header_data
         pass
     def encodeHeader(self):