diff --git a/src/pab/pab.ts b/src/pab/pab.ts
index c94d982605844100d574efe97f13d0e0933c2979..cd9f157d14698e7782362c9cb6d55de76b9771f1 100644
--- a/src/pab/pab.ts
+++ b/src/pab/pab.ts
@@ -66,7 +66,7 @@ export class Pab extends Nub {
         let Z: number = this.prms.Z2.v;
         Z = this.calcZ1(this.downWall, Q, Z);
 
-        for (let i = this.children.length - 1; i > 0; i--) {
+        for (let i = this.children.length - 1; i >= 0; i--) {
 
             // Initialisations for current cloison
             const cl: PabCloisons = this.children[i];