diff --git a/contrib/dict_int/dict_int.c b/contrib/dict_int/dict_int.c
index 163a5029a0b..d0941c66ad9 100644
--- a/contrib/dict_int/dict_int.c
+++ b/contrib/dict_int/dict_int.c
@@ -73,7 +73,7 @@ dintdict_lexize(PG_FUNCTION_ARGS)
 	DictInt    *d = (DictInt *) PG_GETARG_POINTER(0);
 	char	   *in = (char *) PG_GETARG_POINTER(1);
 	char	   *txt = pnstrdup(in, PG_GETARG_INT32(2));
-	TSLexeme   *res = palloc(sizeof(TSLexeme) * 2);
+	TSLexeme   *res = palloc0(sizeof(TSLexeme) * 2);
 
 	res[1].lexeme = NULL;
 	if (PG_GETARG_INT32(2) > d->maxlen)
diff --git a/contrib/dict_xsyn/dict_xsyn.c b/contrib/dict_xsyn/dict_xsyn.c
index 68a631c17a7..892983c48b1 100644
--- a/contrib/dict_xsyn/dict_xsyn.c
+++ b/contrib/dict_xsyn/dict_xsyn.c
@@ -200,7 +200,7 @@ dxsyn_lexize(PG_FUNCTION_ARGS)
 		int			nsyns = 0;
 		bool		is_first = true;
 
-		res = palloc(0);
+		res = palloc(sizeof(TSLexeme));
 
 		while (pos < value + value_length)
 		{
@@ -212,13 +212,13 @@ dxsyn_lexize(PG_FUNCTION_ARGS)
 			*end = '\0';
 
 			res = repalloc(res, sizeof(TSLexeme) * (nsyns + 2));
-			res[nsyns].lexeme = NULL;
 
 			/* first word is added to result only if KEEPORIG flag is set */
 			if (d->keeporig || !is_first)
 			{
 				res[nsyns].lexeme = pstrdup(syn);
-				res[nsyns + 1].lexeme = NULL;
+				res[nsyns].nvariant = 0;
+				res[nsyns].flags = 0;
 
 				nsyns++;
 			}
@@ -228,6 +228,8 @@ dxsyn_lexize(PG_FUNCTION_ARGS)
 			pos = end + 1;
 		}
 
+		res[nsyns].lexeme = NULL;
+
 		pfree(value);
 	}