diff --git a/src/app/components/confirmacion-carrito/confirmacion-carrito.component.ts b/src/app/components/confirmacion-carrito/confirmacion-carrito.component.ts
index 2e31976..55b6f6d 100644
--- a/src/app/components/confirmacion-carrito/confirmacion-carrito.component.ts
+++ b/src/app/components/confirmacion-carrito/confirmacion-carrito.component.ts
@@ -42,13 +42,17 @@ export class ConfirmacionCarritoComponent implements OnInit, OnDestroy {
 
   ngOnDestroy() {
 
-    this.subscribePago.unsubscribe();
+    if (this.subscribePago !== undefined) {
+      this.subscribePago.unsubscribe();
+    }
     clearTimeout(this.timerReposo);
   }
 
   volverPreviousPage() {
 
-    this.subscribePago.unsubscribe();
+    if (this.subscribePago !== undefined) {
+      this.subscribePago.unsubscribe();
+    }
 
     if (this.verQR) {
       this.verQR = !this.verQR;