diff --git a/pgxn/neon_walredo/walredoproc.c b/pgxn/neon_walredo/walredoproc.c
index 619b7255ae..e4da812d32 100644
--- a/pgxn/neon_walredo/walredoproc.c
+++ b/pgxn/neon_walredo/walredoproc.c
@@ -194,6 +194,7 @@ static PgSeccompRule allowed_syscalls[] =
 	 * is stored in MyProcPid anyway.
 	 */
 	PG_SCMP_ALLOW(getpid),
+	PG_SCMP_ALLOW(futex), /* needed for errbacktrace */
 
 	/* Enable those for a proper shutdown. */
 #if 0