diff --git a/contrib/dict_int/dict_int.c b/contrib/dict_int/dict_int.c
index 8e1918613f7..e478e680934 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 dc16d9583e2..656271fa47c 100644
--- a/contrib/dict_xsyn/dict_xsyn.c
+++ b/contrib/dict_xsyn/dict_xsyn.c
@@ -245,6 +245,8 @@ dxsyn_lexize(PG_FUNCTION_ARGS)
 			if (pos != value || d->keeporig)
 			{
 				res[nsyns].lexeme = pnstrdup(syn, end - syn);
+				res[nsyns].nvariant = 0;
+				res[nsyns].flags = 0;
 				nsyns++;
 			}