diff --git a/src/Bundle/ChillPersonBundle/Validator/Constraints/Relationship/RelationshipNoDuplicateValidator.php b/src/Bundle/ChillPersonBundle/Validator/Constraints/Relationship/RelationshipNoDuplicateValidator.php
index b44a966cc..5b1038287 100644
--- a/src/Bundle/ChillPersonBundle/Validator/Constraints/Relationship/RelationshipNoDuplicateValidator.php
+++ b/src/Bundle/ChillPersonBundle/Validator/Constraints/Relationship/RelationshipNoDuplicateValidator.php
@@ -47,10 +47,12 @@ class RelationshipNoDuplicateValidator extends ConstraintValidator
 
         foreach ($relationships as $r) {
             if (spl_object_hash($r) !== spl_object_hash($value)
-                and $r->getFromPerson() === $fromPerson
-                || $r->getFromPerson() === $toPerson
-                || $r->getToPerson() === $fromPerson
-                || $r->getToPerson() === $toPerson
+                and
+                (
+                    ($r->getFromPerson() === $fromPerson and $r->getToPerson() === $toPerson)
+                    ||
+                    ($r->getFromPerson() === $toPerson and $r->getToPerson() === $fromPerson)
+                )
             ) {
                 $this->context->buildViolation($constraint->message)
                     ->addViolation();