Front seat adjustment issue

The recline position of '94 Accord's left front driver seat-back is stuck to one position only, about 120 degrees. When I try to set it to a
more vertical position (90 degree) the latch does not catch it in that position when I lean against the back-seat. This is not happening on the passenger seat though. I wonder if this is something common and easily fixable (sich as tightening some bolt) or something else.
This didn't bother me much before, but now, after a back surgery, it does because I cannot put much pressure on the surgical incision in the lumbar area.
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