diff --git a/src/bin/pg_dump/pg_dumpall.c b/src/bin/pg_dump/pg_dumpall.c
index 3d2a1d27aef..20cdd2d92f0 100644
--- a/src/bin/pg_dump/pg_dumpall.c
+++ b/src/bin/pg_dump/pg_dumpall.c
@@ -455,6 +455,10 @@ main(int argc, char *argv[])
 						schema_only, "-s/--schema-only",
 						tablespaces_only, "-t/--tablespaces-only");
 
+	/* --clean and --data-only are incompatible */
+	check_mut_excl_opts(output_clean, "-c/--clean",
+						data_only, "-a/--data-only");
+
 	if (if_exists && !output_clean)
 		pg_fatal("option %s requires option %s",
 				 "--if-exists", "-c/--clean");
diff --git a/src/bin/pg_dump/t/001_basic.pl b/src/bin/pg_dump/t/001_basic.pl
index 2f5eb48e7b8..86eec1b0064 100644
--- a/src/bin/pg_dump/t/001_basic.pl
+++ b/src/bin/pg_dump/t/001_basic.pl
@@ -101,6 +101,11 @@ command_fails_like(
 	qr/\Qpg_dump: error: options -c\/--clean and -a\/--data-only cannot be used together\E/,
 	'pg_dump: options -c/--clean and -a/--data-only cannot be used together');
 
+command_fails_like(
+	[ 'pg_dumpall', '-c', '-a' ],
+	qr/\Qpg_dumpall: error: options -c\/--clean and -a\/--data-only cannot be used together\E/,
+	'pg_dumpall: options -c/--clean and -a/--data-only cannot be used together');
+
 command_fails_like(
 	[ 'pg_restore', '-c', '-a', '-f -' ],
 	qr/\Qpg_restore: error: options -c\/--clean and -a\/--data-only cannot be used together\E/,