diff --git a/source/engine/generateQuestions.js b/source/engine/generateQuestions.js
index cf0113b21..07eda0374 100644
--- a/source/engine/generateQuestions.js
+++ b/source/engine/generateQuestions.js
@@ -75,8 +75,10 @@ let buildVariantTree = (allRules, path) => {
 }
 
 let buildPossibleInversion = (rule, flatRules, targetNames) => {
-	let inversions = R.path(['formule', 'inversion', 'avec'])(rule),
-		inversionObjects = inversions.map(i =>
+	let ruleInversions = R.path(['formule', 'inversion', 'avec'])(rule)
+	if (!ruleInversions) return null
+	let
+		inversionObjects = ruleInversions.map(i =>
 			findRuleByDottedName(
 				flatRules,
 				disambiguateRuleReference(flatRules, rule, i)
@@ -84,13 +86,11 @@ let buildPossibleInversion = (rule, flatRules, targetNames) => {
 		),
 		yo = R.reject(({ name }) => targetNames.includes(name))([rule].concat(inversionObjects))
 
-	return (
-		inversions && {
-			inversions: yo,
-			question: rule.formule.inversion.question,
-			title: rule.formule.inversion.titre
-		}
-	)
+	return {
+		inversions: yo,
+		question: rule.formule.inversion.question,
+		title: rule.formule.inversion.titre
+	}
 }
 
 export let makeQuestion = (flatRules, targetNames) => dottedName => {