diff --git a/src/backend/replication/basebackup.c b/src/backend/replication/basebackup.c
index 185f32a5f9..841471cfce 100644
--- a/src/backend/replication/basebackup.c
+++ b/src/backend/replication/basebackup.c
@@ -16,6 +16,7 @@
 #include <unistd.h>
 #include <time.h>
 
+#include "access/xlog.h"
 #include "access/xlog_internal.h"	/* for pg_start/stop_backup */
 #include "catalog/catalog.h"
 #include "catalog/pg_type.h"
@@ -30,6 +31,8 @@
 #include "replication/basebackup.h"
 #include "replication/walsender.h"
 #include "replication/walsender_private.h"
+#include "storage/bufpage.h"
+#include "storage/checksum.h"
 #include "storage/dsm_impl.h"
 #include "storage/fd.h"
 #include "storage/ipc.h"
@@ -1199,10 +1202,18 @@ sendFile(const char *readfilename, const char *tarfilename, struct stat *statbuf
 		 bool missing_ok)
 {
 	FILE	   *fp;
+	BlockNumber blkno = 0;
 	char		buf[TAR_SEND_SIZE];
+	uint16		checksum;
 	size_t		cnt;
+	char	   *filename;
+	int			i;
 	pgoff_t		len = 0;
+	char		page[BLCKSZ];
 	size_t		pad;
+	PageHeader  phdr;
+	BlockNumber segno = 0;
+	bool		verify_checksum;
 
 	fp = AllocateFile(readfilename, "rb");
 	if (fp == NULL)
@@ -1214,10 +1225,54 @@ sendFile(const char *readfilename, const char *tarfilename, struct stat *statbuf
 				 errmsg("could not open file \"%s\": %m", readfilename)));
 	}
 
+	/*
+	 * Verify checksums only when checksums are enabled, and the file to
+	 * send is either in one of the default tablespaces (`./global' or
+	 * `./base'), or in an external tablespace with an absolute pathname
+	 * (starting with `/').
+	 */
+	if (DataChecksumsEnabled() &&
+		(strncmp(readfilename, "./global/", 9) == 0 ||
+		strncmp(readfilename, "./base/", 7) == 0 ||
+		strncmp(readfilename, "/", 1) == 0))
+		verify_checksum = 1;
+	else
+		verify_checksum = 0;
+
 	_tarWriteHeader(tarfilename, NULL, statbuf, false);
 
+	/*
+	 * Determine segment number for possible checksum verification, as block
+	 * numbers are ongoing. The initial block number of a multi-segment file is
+	 * the segment number times RELSEG_SIZE.
+	 */
+	filename = basename(readfilename);
+	if (strstr(filename, "."))
+		segno = atoi(strstr(filename, ".")+1);
+	blkno = segno * RELSEG_SIZE;
+
 	while ((cnt = fread(buf, 1, Min(sizeof(buf), statbuf->st_size - len), fp)) > 0)
 	{
+		if (verify_checksum)
+		{
+			/*
+			 * The checksums are verified at block level, so we iterate over
+			 * the buffer in chunks of BLCKSZ.
+			 */
+			for (i = 0; i < cnt / BLCKSZ; i++)
+			{
+				memcpy(page, (buf + BLCKSZ * i), BLCKSZ);
+				checksum = pg_checksum_page((char *) page, blkno);
+				phdr = (PageHeader) page;
+				if (phdr->pd_checksum != checksum)
+					ereport(WARNING,
+							(errmsg("checksum mismatch in file \"%s\", block %d: "
+							"expected %x, found %x", readfilename, blkno,
+							checksum, phdr->pd_checksum)));
+				blkno++;
+			}
+		}
+
 		/* Send the chunk as a CopyData message */
 		if (pq_putmessage('d', buf, cnt))
 			ereport(ERROR,
diff --git a/src/bin/pg_basebackup/t/010_pg_basebackup.pl b/src/bin/pg_basebackup/t/010_pg_basebackup.pl
index cdf4f5be37..b410311791 100644
--- a/src/bin/pg_basebackup/t/010_pg_basebackup.pl
+++ b/src/bin/pg_basebackup/t/010_pg_basebackup.pl
@@ -4,7 +4,7 @@ use Cwd;
 use Config;
 use PostgresNode;
 use TestLib;
-use Test::More tests => 79;
+use Test::More tests => 83;
 
 program_help_ok('pg_basebackup');
 program_version_ok('pg_basebackup');
@@ -15,7 +15,7 @@ my $tempdir = TestLib::tempdir;
 my $node = get_new_node('main');
 
 # Initialize node without replication settings
-$node->init;
+$node->init(extra => [ '--data-checksums' ]);
 $node->start;
 my $pgdata = $node->data_dir;
 
@@ -317,3 +317,19 @@ like(
 	slurp_file("$tempdir/backupxs_sl_R/recovery.conf"),
 	qr/^primary_slot_name = 'slot1'\n/m,
 	'recovery.conf sets primary_slot_name');
+
+my $checksum = $node->safe_psql('postgres', 'SHOW data_checksums;');
+is($checksum, 'on', 'checksums are enabled');
+
+# induce corruption
+my $pg_class = $node->safe_psql('postgres',
+	q{SELECT pg_relation_filepath('pg_class')}
+);
+system_or_bail 'dd', 'conv=notrunc', 'oflag=seek_bytes', 'seek=4000', 'bs=9', 'count=1', 'if=/dev/zero', "of=$pgdata/$pg_class";
+
+$node->command_checks_all([ 'pg_basebackup', '-D', "$tempdir/backup_corrupt"],
+	0,
+	[qr{^$}],
+	[qr/^WARNING.*checksum.mismatch/s],
+	'pg_basebackup reports checksum mismatch'
+);