diff --git a/python/lsst/summit/utils/peekExposure.py b/python/lsst/summit/utils/peekExposure.py
index 38f52ef5..8e643ed3 100644
--- a/python/lsst/summit/utils/peekExposure.py
+++ b/python/lsst/summit/utils/peekExposure.py
@@ -78,6 +78,7 @@ def mode_estimate(data, frac=0.5):
     mode : float
         Estimated mode of the data.
     """
+    data = data[np.isfinite(data)]
     if len(data) == 0:
         return np.nan
     elif len(data) == 1: