diff --git a/becquerel/core/peakfinder.py b/becquerel/core/peakfinder.py
index b0a794cd..a7f95dd4 100644
--- a/becquerel/core/peakfinder.py
+++ b/becquerel/core/peakfinder.py
@@ -392,7 +392,7 @@ def find_peaks(self, xmin=None, xmax=None, min_snr=2, max_num=40):
             raise PeakFinderError("Must keep at least 1 peak, not {}".format(max_num))
 
         # find maxima
-        peak = (self.snr[2:] <= self.snr[1:-1]) & (self.snr[:-2] < self.snr[1:-1])
+        peak = (self.snr[:-2] < self.snr[1:-1]) & (self.snr[1:-1] >= self.snr[2:])
         peak = np.append(False, peak)
         peak = np.append(peak, False)
         # select peaks using SNR and centroid criteria