diff --git a/keyboards/handwired/adept42/config.h b/keyboards/handwired/adept42/config.h
index 29f2ab1730..e2666e8d44 100644
--- a/keyboards/handwired/adept42/config.h
+++ b/keyboards/handwired/adept42/config.h
@@ -27,6 +27,7 @@
 
 /* Enable split usb detect for Sparkfun Pro Micro */
 #define SPLIT_USB_DETECT
+#define SPLIT_USB_TIMEOUT 1000
 
 /* Reduces unintended double presses. Set 0 if debouncing is not needed */
 #define DEBOUNCE 0