diff --git a/TS-0041-oneM2M-SensorThings_interworking.md b/TS-0041-oneM2M-SensorThings_interworking.md
index 3f729bb7e146599c26da87e8256b6831f9007343..dd32f1fe4f76b14243e64c4626539a0da92a27d6 100644
--- a/TS-0041-oneM2M-SensorThings_interworking.md
+++ b/TS-0041-oneM2M-SensorThings_interworking.md
@@ -134,7 +134,7 @@ For the purposes of the present document, the [following] abbreviations [given i
 
 # 4 Conventions
 
-The key words "Shall", "Shall not", "May", "Need not", "Should", "Should not" in this document are to be interpreted as described in the oneM2M Drafting Rules [\[1\]](#_ref_i.1).
+The key words "Shall", "Shall not", "May", "Need not", "Should", "Should not" in this document are to be interpreted as described in the oneM2M Drafting Rules [\[i.1\]](#_ref_i.1).
 
 
 # 5 Introduction to OGC SensorThings API