diff --git a/src/backend/tsearch/dict_synonym.c b/src/backend/tsearch/dict_synonym.c
index fe7ca30ce97..b1a3d955f55 100644
--- a/src/backend/tsearch/dict_synonym.c
+++ b/src/backend/tsearch/dict_synonym.c
@@ -22,7 +22,6 @@ typedef struct
 {
 	char	   *in;
 	char	   *out;
-	int			outlen;
 	uint16		flags;
 } Syn;
 
@@ -187,7 +186,6 @@ dsynonym_init(PG_FUNCTION_ARGS)
 			d->syn[cur].out = lowerstr(starto);
 		}
 
-		d->syn[cur].outlen = strlen(starto);
 		d->syn[cur].flags = flags;
 
 		cur++;
@@ -234,7 +232,7 @@ dsynonym_lexize(PG_FUNCTION_ARGS)
 		PG_RETURN_POINTER(NULL);
 
 	res = palloc0(sizeof(TSLexeme) * 2);
-	res[0].lexeme = pnstrdup(found->out, found->outlen);
+	res[0].lexeme = pstrdup(found->out);
 	res[0].flags = found->flags;
 
 	PG_RETURN_POINTER(res);