diff --git a/converter.py b/converter.py
index f351d811..1844107a 100644
--- a/converter.py
+++ b/converter.py
@@ -32,7 +32,7 @@ def convertMachine(baseName, verbose=True, extraArgs=None):
     if app.returncode == 0:
         cmd = [ '.pio/build/' + pioEnv + '/program' ]
         out_filename = "yaml/" + Path(baseName).stem + ".yaml"
-        proc = subprocess.run(cmd, env=env, stdout=open(out_filename, "w"), stderr=subprocess.STDOUT, bufsize=1)
+        proc = subprocess.run(cmd, env=env, stdout=open(out_filename, "w"), bufsize=1)
         print("FluidNC Configuration written to", out_filename)
         # Sometimes proc.returncode seems to be 245 even when things are okay,
         # so we just return 0.