diff --git a/uYouPlus.xm b/uYouPlus.xm
index 8ecd584..ce4f36c 100644
--- a/uYouPlus.xm
+++ b/uYouPlus.xm
@@ -2,6 +2,7 @@
 #import <Foundation/Foundation.h>
 #import <objc/runtime.h>
 #import <dlfcn.h>
+#import <substrate.h>
 #import <sys/utsname.h>
 #import "Header.h"
 #import "Tweaks/YouTubeHeader/YTVideoQualitySwitchOriginalController.h"