diff --git a/src/lib/situations.ts b/src/lib/situations.ts
index 9beaef7354b4b469243910e08bc2efb8f16d0060..dad2ed5bee8e21309a39669093beadca443ee62b 100644
--- a/src/lib/situations.ts
+++ b/src/lib/situations.ts
@@ -303,7 +303,7 @@ export function setSituationVariableValue(
   ) {
     return false
   }
-  if ((variable.name = "date_naissance")) {
+  if (variable.name === "date_naissance") {
     valueByPeriod[year] = value
   } else {
     valueByPeriod[year - 2] = value