diff --git a/src/gausskernel/process/postmaster/pagewriter.cpp b/src/gausskernel/process/postmaster/pagewriter.cpp
index 048e8ca78..d80fc1462 100644
--- a/src/gausskernel/process/postmaster/pagewriter.cpp
+++ b/src/gausskernel/process/postmaster/pagewriter.cpp
@@ -692,7 +692,7 @@ static int64 get_pagewriter_sleep_time()
     return time_diff;
 }
 
-uint32 get_loc_for_lsn(XLogRecPtr target_lsn)
+uint64 get_loc_for_lsn(XLogRecPtr target_lsn)
 {
     uint64 last_loc = 0;
     XLogRecPtr page_rec_lsn = InvalidXLogRecPtr;
diff --git a/src/include/postmaster/pagewriter.h b/src/include/postmaster/pagewriter.h
index 06fbf2ad4..1d0415e3f 100644
--- a/src/include/postmaster/pagewriter.h
+++ b/src/include/postmaster/pagewriter.h
@@ -104,7 +104,7 @@ extern void ckpt_shutdown_pagewriter();
 extern uint64 get_dirty_page_queue_rec_lsn();
 extern XLogRecPtr ckpt_get_min_rec_lsn(void);
 extern uint32 calculate_thread_max_flush_num(bool is_pagewriter);
-extern uint32 get_loc_for_lsn(XLogRecPtr target_lsn);
+extern uint64 get_loc_for_lsn(XLogRecPtr target_lsn);
 extern uint64 get_time_ms();
 
 const int PAGEWRITER_VIEW_COL_NUM = 8;