diff --git a/ios/RNSScreenStackHeaderConfig.mm b/ios/RNSScreenStackHeaderConfig.mm
index 32d01b098..fa56f5d0e 100644
--- a/ios/RNSScreenStackHeaderConfig.mm
+++ b/ios/RNSScreenStackHeaderConfig.mm
@@ -59,8 +59,10 @@ + (BOOL)RNSisBlank:(NSString *)string
 
 @end
 
+#ifdef RCT_NEW_ARCH_ENABLED
 @interface RNSScreenStackHeaderConfig () <RCTMountingTransactionObserving>
 @end
+#endif // RCT_NEW_ARCH_ENABLED
 
 @implementation RNSScreenStackHeaderConfig {
   NSMutableArray<RNSScreenStackHeaderSubview *> *_reactSubviews;