diff --git a/source/engine/treatVariable.js b/source/engine/treatVariable.js
index 1c019e92f..3792ed33b 100644
--- a/source/engine/treatVariable.js
+++ b/source/engine/treatVariable.js
@@ -28,12 +28,14 @@ export let treatVariable = (rules, rule, filter) => parseResult => {
 			node.explanation.dottedName
 		)
 
-		let variablePeriod = ruleToTransform['période'] || situation('période')
+		let environmentPeriod = situation('période') || 'mois'
+		let callingPeriod = rule['période'] || environmentPeriod
+		let calledPeriod = ruleToTransform['période'] || environmentPeriod
 
 		let newNodeValue =
-			rule['période'] === 'mois' && variablePeriod === 'année'
+			callingPeriod === 'mois' && calledPeriod === 'année'
 				? nodeValue / 12
-				: rule['période'] === 'année' && variablePeriod === 'mois'
+				: callingPeriod === 'année' && calledPeriod === 'mois'
 					? nodeValue * 12
 					: nodeValue
 
diff --git a/test/mécanismes/période.yaml b/test/mécanismes/période.yaml
index 9cb95dd6e..022c6f3e4 100644
--- a/test/mécanismes/période.yaml
+++ b/test/mécanismes/période.yaml
@@ -105,3 +105,19 @@
         assiette deux: 3000
       valeur attendue: 300
 
+- nom: assiette trois
+  période: année
+  format: €
+
+- test: Périodes, variable neutre appelant variable annuelle
+  formule:
+    multiplication:
+      assiette: assiette trois
+      taux: 10%
+
+  exemples:
+    - situation:
+        période: mois
+        assiette trois: 36000
+      valeur attendue: 300
+