diff --git a/src/pyglow/iri.py b/src/pyglow/iri.py
index 8fded94..f437163 100644
--- a/src/pyglow/iri.py
+++ b/src/pyglow/iri.py
@@ -107,7 +107,7 @@ def init_iri(): return False
         jf[4] = 0  # 5  foF2 - URSI
         jf[5] = 0  # 6  Ni - RBV-10 & TTS-03
         jf[20] = 0  # 21 ion drift not computed
-        jf[22] = 0  # 23 Te_topside (TBT-2011)
+        jf[22] = 1  # 23, Te_topside (TBT-2012) (Issue #99 mentions that this should be reversed)
         jf[27] = 0  # 28 spreadF prob not computed
         jf[28] = 0  # 29 (29,30) => NeQuick
         jf[29] = 0  # 30