Update Query with INNER JOIN between tables in 2 different databases on 1 server

Need some SQL syntax help :-)

Both databases are on the same server

db1 = DHE
db2 = DHE_Import

UPDATE DHE.dbo.tblAccounts 
INNER JOIN DHE_Import.dbo.tblSalesRepsAccountsLink 
    ON DHE.dbo.tblAccounts.AccountCode = DHE_Import.tblSalesRepsAccountsLink.AccountCode 
SET DHE.dbo.tblAccounts.ControllingSalesRep = DHE_Import.dbo.tblSalesRepsAccountsLink.SalesRepCode

I can do a query in Access with linked tables with similar syntax - BUT SQL doesn't like it.

I'm sure it's a simple issue :-D

Thanks!