diff --git a/mdevaluate/reader.py b/mdevaluate/reader.py
index f2405df..d386d9c 100755
--- a/mdevaluate/reader.py
+++ b/mdevaluate/reader.py
@@ -197,7 +197,9 @@ def energy_reader(file, energies=None):
     directory = file.rsplit("/", 1)[0]
     ps = subprocess.Popen(("echo", *energies), stdout=subprocess.PIPE)
     try:
-        subprocess.run(("gmx", "energy", "-f", file, "-o", f"{directory}/tmp.xvg", "-quiet"), stdin=ps.stdout)
+        subprocess.run(("gmx", "energy", "-f", file, "-o",
+                        f"{directory}/tmp.xvg", "-quiet", "-nobackup"),
+                       stdin=ps.stdout)
     except FileNotFoundError:
         print("No GROMACS found!")
     ps.wait()