diff --git a/ChangeLog b/ChangeLog
index 8fc0872b395e22542ce2861b41e766ff6b5a539a..d58e43f2b7e39318b152415792a5180fe18984e5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2013-08-12  Richard Larsson  <ric.larsson@gmail.com>
+
+	* ARTS-XML-DATA-2-1-53
+	
+	* spectroscopy/QuantumConstants/zeeman_constants.xml: Forgot I had yet 
+	to add this to arts-xml-data. Now added.
+
 2013-08-12  Richard Larsson  <ric.larsson@gmail.com>
 
 	* ARTS-XML-DATA-2-1-52
diff --git a/spectroscopy/QuantumConstants/zeeman_constant.xml b/spectroscopy/QuantumConstants/zeeman_constant.xml
new file mode 100644
index 0000000000000000000000000000000000000000..c8fce3b9d4cec145061e6006edf0caa12b7b094f
--- /dev/null
+++ b/spectroscopy/QuantumConstants/zeeman_constant.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0"?>
+<arts format="ascii" version="1">
+<SpeciesAuxData version="1" nelem="14" nparam="3">
+@ O2-66 2.002064 1 1
+@ O2-68 2.002064 1 1
+@ O2-67 2.002064 1 1
+@ NO-46 2.00071 0.5 0
+@ NO-56 2.00071 0.5 0
+@ NO-48 2.00071 0.5 0
+@ OH-61 2.00089 0.5 0
+@ OH-81 2.00089 0.5 0
+@ OH-62 2.00089 0.5 0
+@ ClO-56 2.00072 0.5
+@ ClO-76 2.00072 0.5
+@ SO-26 2.002106 1 1
+@ SO-46 2.002106 1 1
+@ SO-28 2.002106 1 1
+</SpeciesAuxData>
+</arts>