diff --git a/libraries/entropy/client/interfaces/methods.py b/libraries/entropy/client/interfaces/methods.py
index 11ab13750..f40c66d85 100644
--- a/libraries/entropy/client/interfaces/methods.py
+++ b/libraries/entropy/client/interfaces/methods.py
@@ -1356,8 +1356,18 @@ class Misc:
                     path = os.path.realpath(path)
 
                 tarinfo = tar.gettarinfo(path, arcname)
-                tarinfo.uname = id_strings.setdefault(tarinfo.uid, str(tarinfo.uid))
-                tarinfo.gname = id_strings.setdefault(tarinfo.gid, str(tarinfo.gid))
+
+                uid = tarinfo.uid
+                gid = tarinfo.gid
+                user = self.entropyTools.get_user_from_uid(uid)
+                group = self.entropyTools.get_group_from_gid(gid)
+                if user == None:
+                    user = str(uid)
+                if group == None:
+                    group = str(gid)
+
+                tarinfo.uname = id_strings.setdefault(tarinfo.uid, user)
+                tarinfo.gname = id_strings.setdefault(tarinfo.gid, group)
 
                 if stat.S_ISREG(exist.st_mode):
                     tarinfo.type = tarfile.REGTYPE