diff --git a/CHANGES.rst b/CHANGES.rst
index 476359d9e4..00ffe2c961 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -7,6 +7,11 @@ ramp_fitting
 - Fix a bug in estimating the max number of segments that will be needed
   to fit any pixel [#5653]
 
+white_light
+-----------
+
+- Fixed error causing multi-segment data to reject int_times
+  for MJDs [#5566]
 
 
 0.18.2 (2021-01-19)
diff --git a/jwst/white_light/white_light.py b/jwst/white_light/white_light.py
index 145836a068..21cc5f36ad 100644
--- a/jwst/white_light/white_light.py
+++ b/jwst/white_light/white_light.py
@@ -93,7 +93,7 @@ def white_light(input, min_wave=None, max_wave=None):
         int_num = input.int_times['integration_number']         # one indexed
         mid_utc = input.int_times['int_mid_MJD_UTC']
         offset = int_start - int_num[0]
-        if offset < 0 or int_end >= int_num[-1]:
+        if offset < 0 or int_end > int_num[-1]:
             log.warning("Range of integration numbers in science data extends "
                         "outside the range in INT_TIMES table.")
             log.warning("Can't use INT_TIMES table.")