Stephen Robinson will revert to his tried-and-trusted back three as St Mirren look to bounce back from the biggest defeat of his four-year reign as manager.
Robinson matched Motherwell's 4-2-3-1 formation on Saturday only to suffer a 5-0 thrashing and St Mirren will likely adopt more familiar tactics when they travel to face Livingston on Saturday.
"I changed the shape - it was a step too far for them and we need to get back to absolute basics of putting balls in behind people," he said.
"We were good at what we'd done. I've tried to change that. I've tried to evolve that with the squad that we have because we don't really have what we had before available to me at this moment in time.
"We tried to put two wingers on the pitch. We tried to be more attacking. We tried to go that back four."
However, Robinson insisted none of the goals conceded to Motherwell "were really because of the system".
"If we look at the goals, they were really, really poor goals," he added. "Four out of the five goals were individual errors.
"I'm not going to hang anybody out to dry. I have to take full responsibility. We make mistakes in life, but that has to be me that looks in the mirror."