The analysis of ChIP-seq samples outputs a number of enriched regions (commonly known as "peaks"), each indicating a protein-DNA interaction or a specific chromatin modification. When replicate samples are analysed, overlapping peaks are expected. This repeated evidence can therefore be used to locally lower the minimum significance required to accept a peak. Here, we propose a method for joint analysis of weak peaks. Given a set of peaks from (biological or technical) replicates, the method combines the p-values of overlapping enriched regions, and allows the "rescue" of weak peaks occuring in more than one replicate.