diff --git a/src/backend/utils/adt/tsquery.c b/src/backend/utils/adt/tsquery.c
index 2473f0df729c474c17b8b662880b12f0711835e6..6e1f8cfdb0deb34e826f0ac8d0a71f4c10324931 100644
--- a/src/backend/utils/adt/tsquery.c
+++ b/src/backend/utils/adt/tsquery.c
@@ -570,8 +570,6 @@ tsqueryin(PG_FUNCTION_ARGS)
 {
 	char	   *in = PG_GETARG_CSTRING(0);
 
-	pg_verifymbstr(in, strlen(in), false);
-
 	PG_RETURN_TSQUERY(parse_tsquery(in, pushval_asis, PointerGetDatum(NULL), false));
 }
 
diff --git a/src/backend/utils/adt/tsvector.c b/src/backend/utils/adt/tsvector.c
index 4262ea9e91ea252e22743261042544637cb56ce9..8a81f3d8295f85bb9e36898d0ea326a171549890 100644
--- a/src/backend/utils/adt/tsvector.c
+++ b/src/backend/utils/adt/tsvector.c
@@ -198,8 +198,6 @@ tsvectorin(PG_FUNCTION_ARGS)
 	char	   *cur;
 	int			buflen = 256;	/* allocated size of tmpbuf */
 
-	pg_verifymbstr(buf, strlen(buf), false);
-
 	state = init_tsvector_parser(buf, false, false);
 
 	arrlen = 64;