diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
index 1da3b8eb2e..15ab8d90d4 100644
--- a/src/backend/access/transam/xlog.c
+++ b/src/backend/access/transam/xlog.c
@@ -8302,13 +8302,8 @@ do_pg_backup_start(const char *backupidstr, bool fast, TimeLineID *starttli_p,
 			 * we sometimes use allow_in_place_tablespaces to create
 			 * directories directly under pg_tblspc, which would fail below.
 			 */
-#ifdef WIN32
-			if (!pgwin32_is_junction(fullpath))
-				continue;
-#else
 			if (get_dirent_type(fullpath, de, false, ERROR) != PGFILETYPE_LNK)
 				continue;
-#endif
 
 #if defined(HAVE_READLINK) || defined(WIN32)
 			rllen = readlink(fullpath, linkpath, sizeof(linkpath));
diff --git a/src/bin/pg_basebackup/t/010_pg_basebackup.pl b/src/bin/pg_basebackup/t/010_pg_basebackup.pl
index 87a211315f..3d1a4ddd5c 100644
--- a/src/bin/pg_basebackup/t/010_pg_basebackup.pl
+++ b/src/bin/pg_basebackup/t/010_pg_basebackup.pl
@@ -904,4 +904,21 @@ ok( pump_until(
 	'background process exit message');
 $sigchld_bb->finish();
 
+# Test that we can back up an in-place tablespace
+$node->safe_psql('postgres',
+	"SET allow_in_place_tablespaces = on; CREATE TABLESPACE tblspc2 LOCATION '';");
+$node->safe_psql('postgres',
+	    "CREATE TABLE test2 (a int) TABLESPACE tblspc2;"
+	  . "INSERT INTO test2 VALUES (1234);");
+my $tblspc_oid = $node->safe_psql('postgres',
+	"SELECT oid FROM pg_tablespace WHERE spcname = 'tblspc2';");
+$node->backup('backup3');
+$node->safe_psql('postgres', "DROP TABLE test2;");
+$node->safe_psql('postgres', "DROP TABLESPACE tblspc2;");
+
+# check that the in-place tablespace exists in the backup
+$backupdir = $node->backup_dir . '/backup3';
+my @dst_tblspc = glob "$backupdir/pg_tblspc/$tblspc_oid/PG_*";
+is(@dst_tblspc, 1, 'tblspc directory copied');
+
 done_testing();