diff --git a/conditor-dumps/04-enrich.ini b/conditor-dumps/04-enrich.ini
index 1f752fc..486aa7a 100644
--- a/conditor-dumps/04-enrich.ini
+++ b/conditor-dumps/04-enrich.ini
@@ -106,7 +106,14 @@
 
 [assign]
 path = ApilWsInstitutCnrs
-value = get("ApilWsInstitutCnrs").map("value")
+value = get("ApilWsInstitutCnrs") \
+        .map("value") \
+        .filter(institut => institut && institut !== "n/a")
+
+# S'il y a au moins un institut, il y a au moins une affiliation CNRS
+[assign]
+path = ApilWsIsCnrs
+value = get("ApilWsInstitutCnrs").thru(array => Boolean(array.length))
 
 ################################################################