diff --git a/src/bin/psql/command.c b/src/bin/psql/command.c
index b6558431225..83002f53bc0 100644
--- a/src/bin/psql/command.c
+++ b/src/bin/psql/command.c
@@ -2289,7 +2289,7 @@ do_pset(const char *param, const char *value, printQueryOpt *popt, bool quiet)
 			popt->topt.format = PRINT_TROFF_MS;
 		else
 		{
-			psql_error("\\pset: allowed formats are unaligned, aligned, wrapped, html, latex, troff-ms\n");
+			psql_error("\\pset: allowed formats are unaligned, aligned, wrapped, html, latex, latex-longtable, troff-ms\n");
 			return false;
 		}