diff --git a/src/bin/pg_basebackup/receivelog.c b/src/bin/pg_basebackup/receivelog.c
index 70f42467649..8543f3576a8 100644
--- a/src/bin/pg_basebackup/receivelog.c
+++ b/src/bin/pg_basebackup/receivelog.c
@@ -192,7 +192,7 @@ static bool
 close_walfile(StreamCtl *stream, XLogRecPtr pos)
 {
 	char	   *fn;
-	off_t		currpos;
+	pgoff_t		currpos;
 	int			r;
 	char		walfile_name[MAXPGPATH];
 
diff --git a/src/bin/pg_basebackup/walmethods.c b/src/bin/pg_basebackup/walmethods.c
index f17600de9d2..935429ea1e8 100644
--- a/src/bin/pg_basebackup/walmethods.c
+++ b/src/bin/pg_basebackup/walmethods.c
@@ -691,7 +691,7 @@ const WalWriteMethodOps WalTarMethodOps = {
 typedef struct TarMethodFile
 {
 	Walfile		base;
-	off_t		ofs_start;		/* Where does the *header* for this file start */
+	pgoff_t		ofs_start;		/* Where does the *header* for this file start */
 	char		header[TAR_BLOCK_SIZE];
 	size_t		pad_to_size;
 } TarMethodFile;
diff --git a/src/bin/pg_basebackup/walmethods.h b/src/bin/pg_basebackup/walmethods.h
index c9042600f95..488dd8f92d3 100644
--- a/src/bin/pg_basebackup/walmethods.h
+++ b/src/bin/pg_basebackup/walmethods.h
@@ -17,7 +17,7 @@ typedef struct WalWriteMethod WalWriteMethod;
 typedef struct
 {
 	WalWriteMethod *wwmethod;
-	off_t		currpos;
+	pgoff_t		currpos;
 	char	   *pathname;
 
 	/*