diff --git a/libs/components/src/lib/components/tabs/tabs.component.ts b/libs/components/src/lib/components/tabs/tabs.component.ts
index 08bb1976d..d1b3fa1d6 100644
--- a/libs/components/src/lib/components/tabs/tabs.component.ts
+++ b/libs/components/src/lib/components/tabs/tabs.component.ts
@@ -115,8 +115,8 @@ export class PrizmTabsComponent extends PrizmAbstractTestId implements OnInit, O
 
   readonly prizmIsTextOverflow$ = prizmIsTextOverflow$;
 
-  private mutationObserver!: MutationObserver;
-  private resizeObserver!: ResizeObserver;
+  private mutationObserver?: MutationObserver;
+  private resizeObserver?: ResizeObserver;
   private mutationDetector$: Subject<void> = new Subject<void>();
   private subscription: Subscription = new Subscription();
 
@@ -169,8 +169,8 @@ export class PrizmTabsComponent extends PrizmAbstractTestId implements OnInit, O
   }
 
   public ngOnDestroy(): void {
-    this.mutationObserver.disconnect();
-    this.resizeObserver.disconnect();
+    this.mutationObserver?.disconnect();
+    this.resizeObserver?.disconnect();
     this.mutationDetector$.complete();
     this.subscription.unsubscribe();
   }