It's fine - both are possible. When you are reporting a remark made in the past, you have the choice of leaving the verb in it's original form or "backshifting" it. So eg
The weather forecast said it'
s going to be hot tomorrow.
The weather forecast said it
was going to be hot tomorrow.
are both possible
Here are a few taken from a
concordancer :
a) without backshift
Of these, 376 SAID they
make no extra charge for strapping in standard units...
Louis H. Grenier, clerk of the board, SAID that the appeals
will be reviewed in December
b) with backshift
House Republican Leader Charles Halleck [Ind.] SAID the message
did not persuade them to change their opposition
...and SAID that she
felt that they
understood one another perfectly
...and SAID he
would arrange the things Rector
requested.
The old man came from the front of the plane and SAID he
wanted four volunteers to go to Cuba
The board SAID it
thought it
had gone as far as instructed so far
Have a look at the link. You'll find a lot more examples with backshift than without, so that's proabably the most common form.
All these examples use a reporting verb (
said) but it's exacrtly the same in your example where the report is implicit - or maybe has been given previously? If you'd given the full context it would have been easier to see.