The G20 communique states that euro-area members of the G20 "will take all necessary policy measures to safeguard the integrity and stability of the area, improve financial markets and break the feedback loop between sovereigns and banks".
The US, the IMF and European commission have been urging EU member states to press ahead with a banking union.
The term banking union does not appear in the text, but the wording suggests Germany may be willing to shift a little in further talks due to be held between EU leaders both in Rome on Friday and then at a full gathering of EU heads of state in Brussels next week.