diff --git a/lddecode/core.py b/lddecode/core.py
index e5e14cc7b..b5d7f55da 100644
--- a/lddecode/core.py
+++ b/lddecode/core.py
@@ -3982,6 +3982,7 @@ def build_json(self, f):
         vp = {}
 
         vp["numberOfSequentialFields"] = len(self.fieldinfo)
+        vp["osInfo"] = f'{platform.system()}:{platform.release()}:{platform.version()}'
 
         if f is None:
             return