diff --git a/src/backend/libpq/be-fsstubs.c b/src/backend/libpq/be-fsstubs.c
index 5804532881..55b25b19ea 100644
--- a/src/backend/libpq/be-fsstubs.c
+++ b/src/backend/libpq/be-fsstubs.c
@@ -245,6 +245,8 @@ be_lo_creat(PG_FUNCTION_ARGS)
 {
 	Oid			lobjId;
 
+	PreventCommandDuringRecovery("lo_creat()");
+
 	lo_cleanup_needed = true;
 	lobjId = inv_create(InvalidOid);
 
@@ -256,6 +258,8 @@ be_lo_create(PG_FUNCTION_ARGS)
 {
 	Oid			lobjId = PG_GETARG_OID(0);
 
+	PreventCommandDuringRecovery("lo_create()");
+
 	lo_cleanup_needed = true;
 	lobjId = inv_create(lobjId);
 
@@ -306,6 +310,8 @@ be_lo_unlink(PG_FUNCTION_ARGS)
 {
 	Oid			lobjId = PG_GETARG_OID(0);
 
+	PreventCommandDuringRecovery("lo_unlink()");
+
 	/*
 	 * Must be owner of the large object.  It would be cleaner to check this
 	 * in inv_drop(), but we want to throw the error before not after closing
@@ -368,6 +374,8 @@ be_lowrite(PG_FUNCTION_ARGS)
 	int			bytestowrite;
 	int			totalwritten;
 
+	PreventCommandDuringRecovery("lowrite()");
+
 	bytestowrite = VARSIZE_ANY_EXHDR(wbuf);
 	totalwritten = lo_write(fd, VARDATA_ANY(wbuf), bytestowrite);
 	PG_RETURN_INT32(totalwritten);
@@ -413,6 +421,8 @@ lo_import_internal(text *filename, Oid lobjOid)
 	LargeObjectDesc *lobj;
 	Oid			oid;
 
+	PreventCommandDuringRecovery("lo_import()");
+
 	/*
 	 * open the file to be read in
 	 */
@@ -539,6 +549,8 @@ lo_truncate_internal(int32 fd, int64 len)
 {
 	LargeObjectDesc *lobj;
 
+	PreventCommandDuringRecovery("lo_truncate()");
+
 	if (fd < 0 || fd >= cookies_size || cookies[fd] == NULL)
 		ereport(ERROR,
 				(errcode(ERRCODE_UNDEFINED_OBJECT),
@@ -815,6 +827,8 @@ be_lo_from_bytea(PG_FUNCTION_ARGS)
 	LargeObjectDesc *loDesc;
 	int			written PG_USED_FOR_ASSERTS_ONLY;
 
+	PreventCommandDuringRecovery("lo_from_bytea()");
+
 	lo_cleanup_needed = true;
 	loOid = inv_create(loOid);
 	loDesc = inv_open(loOid, INV_WRITE, CurrentMemoryContext);
@@ -837,6 +851,8 @@ be_lo_put(PG_FUNCTION_ARGS)
 	LargeObjectDesc *loDesc;
 	int			written PG_USED_FOR_ASSERTS_ONLY;
 
+	PreventCommandDuringRecovery("lo_put()");
+
 	lo_cleanup_needed = true;
 	loDesc = inv_open(loOid, INV_WRITE, CurrentMemoryContext);