diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
index 55cac186dc7..a1256a103b6 100644
--- a/src/backend/access/transam/xlog.c
+++ b/src/backend/access/transam/xlog.c
@@ -10481,8 +10481,7 @@ issue_xlog_fsync(int fd, XLogSegNo segno)
 XLogRecPtr
 do_pg_start_backup(const char *backupidstr, bool fast, TimeLineID *starttli_p,
 				   StringInfo labelfile, List **tablespaces,
-				   StringInfo tblspcmapfile, bool infotbssize,
-				   bool needtblspcmapfile)
+				   StringInfo tblspcmapfile, bool needtblspcmapfile)
 {
 	bool		exclusive = (labelfile == NULL);
 	bool		backup_started_in_recovery = false;
@@ -10702,14 +10701,6 @@ do_pg_start_backup(const char *backupidstr, bool fast, TimeLineID *starttli_p,
 
 		datadirpathlen = strlen(DataDir);
 
-		/*
-		 * Report that we are now estimating the total backup size if we're
-		 * streaming base backup as requested by pg_basebackup
-		 */
-		if (tablespaces)
-			pgstat_progress_update_param(PROGRESS_BASEBACKUP_PHASE,
-										 PROGRESS_BASEBACKUP_PHASE_ESTIMATE_BACKUP_SIZE);
-
 		/* Collect information about all tablespaces */
 		tblspcdir = AllocateDir("pg_tblspc");
 		while ((de = ReadDir(tblspcdir, "pg_tblspc")) != NULL)
@@ -10774,8 +10765,7 @@ do_pg_start_backup(const char *backupidstr, bool fast, TimeLineID *starttli_p,
 			ti->oid = pstrdup(de->d_name);
 			ti->path = pstrdup(buflinkpath.data);
 			ti->rpath = relpath ? pstrdup(relpath) : NULL;
-			ti->size = infotbssize ?
-				sendTablespace(fullpath, ti->oid, true, NULL) : -1;
+			ti->size = -1;
 
 			if (tablespaces)
 				*tablespaces = lappend(*tablespaces, ti);
diff --git a/src/backend/access/transam/xlogfuncs.c b/src/backend/access/transam/xlogfuncs.c
index 00e1b33ed5f..290658b22c1 100644
--- a/src/backend/access/transam/xlogfuncs.c
+++ b/src/backend/access/transam/xlogfuncs.c
@@ -76,7 +76,7 @@ pg_start_backup(PG_FUNCTION_ARGS)
 	if (exclusive)
 	{
 		startpoint = do_pg_start_backup(backupidstr, fast, NULL, NULL,
-										NULL, NULL, false, true);
+										NULL, NULL, true);
 	}
 	else
 	{
@@ -94,7 +94,7 @@ pg_start_backup(PG_FUNCTION_ARGS)
 		register_persistent_abort_backup_handler();
 
 		startpoint = do_pg_start_backup(backupidstr, fast, NULL, label_file,
-										NULL, tblspc_map_file, false, true);
+										NULL, tblspc_map_file, true);
 	}
 
 	PG_RETURN_LSN(startpoint);
diff --git a/src/backend/replication/basebackup.c b/src/backend/replication/basebackup.c
index 10082820655..62633e7ddcd 100644
--- a/src/backend/replication/basebackup.c
+++ b/src/backend/replication/basebackup.c
@@ -58,6 +58,8 @@ typedef struct
 	pg_checksum_type manifest_checksum_type;
 } basebackup_options;
 
+static int64 sendTablespace(char *path, char *oid, bool sizeonly,
+							struct backup_manifest_info *manifest);
 static int64 sendDir(const char *path, int basepathlen, bool sizeonly,
 					 List *tablespaces, bool sendtblspclinks,
 					 backup_manifest_info *manifest, const char *spcoid);
@@ -307,8 +309,7 @@ perform_base_backup(basebackup_options *opt)
 								 PROGRESS_BASEBACKUP_PHASE_WAIT_CHECKPOINT);
 	startptr = do_pg_start_backup(opt->label, opt->fastcheckpoint, &starttli,
 								  labelfile, &tablespaces,
-								  tblspc_map_file,
-								  opt->progress, opt->sendtblspcmapfile);
+								  tblspc_map_file, opt->sendtblspcmapfile);
 
 	/*
 	 * Once do_pg_start_backup has been called, ensure that any failure causes
@@ -337,10 +338,7 @@ perform_base_backup(basebackup_options *opt)
 
 		/* Add a node for the base directory at the end */
 		ti = palloc0(sizeof(tablespaceinfo));
-		if (opt->progress)
-			ti->size = sendDir(".", 1, true, tablespaces, true, NULL, NULL);
-		else
-			ti->size = -1;
+		ti->size = -1;
 		tablespaces = lappend(tablespaces, ti);
 
 		/*
@@ -349,10 +347,19 @@ perform_base_backup(basebackup_options *opt)
 		 */
 		if (opt->progress)
 		{
+			pgstat_progress_update_param(PROGRESS_BASEBACKUP_PHASE,
+										 PROGRESS_BASEBACKUP_PHASE_ESTIMATE_BACKUP_SIZE);
+
 			foreach(lc, tablespaces)
 			{
 				tablespaceinfo *tmp = (tablespaceinfo *) lfirst(lc);
 
+				if (tmp->path == NULL)
+					tmp->size = sendDir(".", 1, true, tablespaces, true, NULL,
+										NULL);
+				else
+					tmp->size = sendTablespace(tmp->path, tmp->oid, true,
+											   NULL);
 				backup_total += tmp->size;
 			}
 		}
@@ -1145,7 +1152,7 @@ sendFileWithContent(const char *filename, const char *content,
  *
  * Only used to send auxiliary tablespaces, not PGDATA.
  */
-int64
+static int64
 sendTablespace(char *path, char *spcoid, bool sizeonly,
 			   backup_manifest_info *manifest)
 {
diff --git a/src/include/access/xlog.h b/src/include/access/xlog.h
index e917dfe92d8..347a38f57cf 100644
--- a/src/include/access/xlog.h
+++ b/src/include/access/xlog.h
@@ -372,7 +372,7 @@ typedef enum SessionBackupState
 
 extern XLogRecPtr do_pg_start_backup(const char *backupidstr, bool fast,
 									 TimeLineID *starttli_p, StringInfo labelfile,
-									 List **tablespaces, StringInfo tblspcmapfile, bool infotbssize,
+									 List **tablespaces, StringInfo tblspcmapfile,
 									 bool needtblspcmapfile);
 extern XLogRecPtr do_pg_stop_backup(char *labelfile, bool waitforarchive,
 									TimeLineID *stoptli_p);
diff --git a/src/include/replication/basebackup.h b/src/include/replication/basebackup.h
index 923a651cac3..f5f044dacd4 100644
--- a/src/include/replication/basebackup.h
+++ b/src/include/replication/basebackup.h
@@ -14,9 +14,6 @@
 
 #include "nodes/replnodes.h"
 
-struct backup_manifest_info;	/* avoid including backup_manifest.h */
-
-
 /*
  * Minimum and maximum values of MAX_RATE option in BASE_BACKUP command.
  */
@@ -33,7 +30,4 @@ typedef struct
 
 extern void SendBaseBackup(BaseBackupCmd *cmd);
 
-extern int64 sendTablespace(char *path, char *oid, bool sizeonly,
-							struct backup_manifest_info *manifest);
-
 #endif							/* _BASEBACKUP_H */