diff --git a/docs/doxygen/other/reference_docs.dox b/docs/doxygen/other/reference_docs.dox
index 78acda714..3759c876a 100644
--- a/docs/doxygen/other/reference_docs.dox
+++ b/docs/doxygen/other/reference_docs.dox
@@ -40,7 +40,7 @@ Check the <a href="http://ec.europa.eu/enterprise/policies/satnav/galileo/index_
 <a href="http://www.esa.int/Our_Activities/Navigation/The_future_-_Galileo/What_is_Galileo" target="_blank">Galileo website of the European Space Agency</a>.
 There is a website with <a href="http://igs.org/mgex/Status_GAL.htm" target="_blank">Galileo constellation status information</a> from the International GNSS Service.
 
-\li Galileo E5, E6, and E1: European GNSS (Galileo) Open Service.  <a href="http://ec.europa.eu/enterprise/policies/satnav/galileo/files/galileo-os-sis-icd-issue1-revision1_en.pdf" target="_blank"><b>Signal In Space Interface Control Document. Ref: OS SIS ICD, Issue 1.1</b></a>, European Commission, Sept. 2010. 
+\li Galileo E5, E6, and E1: European GNSS (Galileo) Open Service.  <a href="http://www.gsc-europa.eu/system/files/galileo_documents/Galileo_OS_SIS_ICD.pdf" target="_blank"><b>Signal In Space Interface Control Document. Ref: OS SIS ICD, Issue 1.2</b></a>, European Commission, Nov. 2015. 
 
 \li European GNSS (Galileo) Open Service  <a href="" target="_blank"><b>Signal-In-Space Operational Status Definition</b></a>, European Commission, Sept. 2015.