diff --git a/ui.h b/ui.h
index 22f3e5c..8cc1da1 100644
--- a/ui.h
+++ b/ui.h
@@ -134,7 +134,7 @@
     pthread_t input_t;
 
     static void* input_thread(void* cookie);
-    static int input_callback(int fd, unsigned int epevents, void* data);
+    static int input_callback(int fd, uint32_t epevents, void* data);
     void process_key(int key_code, int updown);
     bool usb_connected();