diff --git a/src/backend/utils/adt/jsonb.c b/src/backend/utils/adt/jsonb.c
index 0ae9d7b..c709906 100644
--- a/src/backend/utils/adt/jsonb.c
+++ b/src/backend/utils/adt/jsonb.c
@@ -2051,3 +2051,20 @@ jsonb_float8(PG_FUNCTION_ARGS)
 
 	PG_RETURN_DATUM(retValue);
 }
+
+/*
+ * send jsonb as bytea in the format:
+ * uint8 version number, then a string of bytes (in the on-disk format)
+*/
+Datum
+jsonb_raw_bytes(PG_FUNCTION_ARGS)
+{
+	Jsonb	   *jb = PG_GETARG_JSONB_P(0);
+	StringInfoData buf;
+	pq_begintypsend(&buf);
+	int			version = 1;
+	pq_sendint8(&buf, version);
+	pq_sendbytes(&buf, VARDATA(jb), VARSIZE_ANY_EXHDR(jb));
+
+	PG_RETURN_BYTEA_P(pq_endtypsend(&buf));
+}
diff --git a/src/include/catalog/pg_proc.dat b/src/include/catalog/pg_proc.dat
index a146510..a90df9d 100644
--- a/src/include/catalog/pg_proc.dat
+++ b/src/include/catalog/pg_proc.dat
@@ -4391,6 +4391,9 @@
 { oid => '2580', descr => 'convert jsonb to float8',
   proname => 'float8', prorettype => 'float8', proargtypes => 'jsonb',
   prosrc => 'jsonb_float8' },
+{ oid => '4142', descr => 'convert jsonb to raw bytes',
+  proname => 'jsonb_raw_bytes', prorettype => 'bytea', proargtypes => 'jsonb',
+  prosrc => 'jsonb_raw_bytes' }
 
 # formatting
 { oid => '1770', descr => 'format timestamp with time zone to text',