diff --git a/app/scodoc/sco_apogee_csv.py b/app/scodoc/sco_apogee_csv.py
index e6b40842be..d36d8e9c3c 100644
--- a/app/scodoc/sco_apogee_csv.py
+++ b/app/scodoc/sco_apogee_csv.py
@@ -92,6 +92,7 @@ import time
 from zipfile import ZipFile
 
 from flask import send_file
+import numpy as np
 
 # Pour la détection auto de l'encodage des fichiers Apogée:
 from chardet import detect as chardet_detect
@@ -134,6 +135,8 @@ def _apo_fmt_note(note, fmt="%3.2f"):
         val = float(note)
     except ValueError:
         return ""
+    if np.isnan(val):
+        return ""
     return (fmt % val).replace(".", APO_DECIMAL_SEP)