diff --git a/pycbc/frame/gwosc.py b/pycbc/frame/gwosc.py
index 978ba746a79..9b00f033406 100644
--- a/pycbc/frame/gwosc.py
+++ b/pycbc/frame/gwosc.py
@@ -49,6 +49,7 @@ def get_run(time, ifo=None):
             1180911618 <= time <= 1180982427 and ifo == 'H1',
             'BKGW170608_16KHZ_R1'
         ),
+    	(1396417050 <= time <= 1422118818, 'O4b_16KHZ_R1'),
         (1368195220 <= time <= 1389456018, 'O4a_16KHZ_R1'),
         (1253977219 <= time <= 1320363336, 'O3b_16KHZ_R1'),
         (1238166018 <= time <= 1253977218, 'O3a_16KHZ_R1'),