diff --git a/Header.h b/Header.h
index 88f0ed9..22764e4 100644
--- a/Header.h
+++ b/Header.h
@@ -35,6 +35,7 @@
 #define LOC(x) [tweakBundle localizedStringForKey:x value:nil table:nil]
 #define YT_BUNDLE_ID @"com.google.ios.youtube"
 #define YT_NAME @"YouTube"
+#define LOWCONTRASTMODE_CUTOFF_VERSION @"17.38.10"
 
 // YTSpeed
 @interface YTVarispeedSwitchControllerOption : NSObject