diff --git a/src/iotop.h b/src/iotop.h
index 74cde0b..aa98a18 100644
--- a/src/iotop.h
+++ b/src/iotop.h
@@ -187,7 +187,7 @@ inline int64_t monotime(void);
 inline char *u8strpadt(const char *s,ssize_t len);
 inline char *esc_low_ascii(char *p);
 
-typedef void (*pg_cb)(pid_t pid,pid_t tid,void *hint1,void *hint2);
+typedef void (*pg_cb)(pid_t pid,pid_t tid,struct xxxid_stats_arr *hint1,filter_callback hint2);
 inline void pidgen_cb(pg_cb cb,void *hint1,void *hint2);