diff --git a/AUTHORS.md b/AUTHORS.md
index c4f5d27d..187f3de0 100644
--- a/AUTHORS.md
+++ b/AUTHORS.md
@@ -12,3 +12,4 @@ The following people have made contributions to this project:
 - [Panu Lahtinen (pnuu)](https://github.com/pnuu)
 - [Lars Ørum Rasmussen (loerum)](https://github.com/loerum)
 - [Martin Raspaud (mraspaud)](https://github.com/mraspaud)
+- [Dario Stelitano (bornagain1981)] (https://github.com/bornagain1981)
diff --git a/trollmoves/server.py b/trollmoves/server.py
index 332401a8..50e04bf7 100644
--- a/trollmoves/server.py
+++ b/trollmoves/server.py
@@ -931,7 +931,7 @@ def unpack(pathname,
            compression=None,
            working_directory=None,
            prog=None,
-           delete="False",
+           delete=False,
            **kwargs):
     """Unpack *pathname*."""
     del kwargs
@@ -945,7 +945,8 @@ def unpack(pathname,
         except Exception:
             LOGGER.exception("Could not decompress %s", pathname)
         else:
-            if delete.lower() in ["1", "yes", "true", "on"]:
+            if delete in ["1", "yes", "true", "on"]:
+                delete = True
                 os.remove(pathname)
             return new_path
     return pathname