diff --git a/files/scan.py b/files/scan.py
index 77a0f50a6120c3c7af2c1e50896d217c332514a7..c3c39a15efaa7670bdf29071ff1e929debf5a3ba 100644
--- a/files/scan.py
+++ b/files/scan.py
@@ -150,9 +150,9 @@ with open(summary_filename, "w") as f:
 with open(oids_filename, "w") as f:
     if len(accepted_oids) > 0:
         f.write("ACCEPTED OIDs\n")
-        f.writelines([msg + "\n" for msg in accepted_oids])
+        f.writelines([msg + "\n" for msg in set(accepted_oids)])
         f.write("\n")
     
     if len(new_oids) > 0:
         f.write("NEW OIDs\n")
-        f.writelines([msg + "\n" for msg in new_oids])
+        f.writelines([msg + "\n" for msg in set(new_oids)])