Commentary for Berakhot 57:27

אלא אידי ואידי ביחיד ול"ק הא דאדכר קודם שומע תפלה

Nay, both the teachings refer to one praying alone and there is no contradiction ; the statement [of R. Tanhum] refers to one who reminds himself [that he had omitted the prayer for rain] before reaching the benediction "Who hearkenest unto prayer,"

Abraham Cohen Footnotes to the English Translation of Masechet Berakhot