diff --git a/guide/preface.txt b/guide/preface.txt
index 4059d07..942bb89 100644
--- a/guide/preface.txt
+++ b/guide/preface.txt
@@ -85,7 +85,7 @@ referenced the *emane-guide* are as follows:
   there may be material in the wiki and tutorial that is not yet
   included in this guide.
 
-  [https://https://github.com/adjacentlink/emane/wiki](https://https://github.com/adjacentlink/emane/wiki)
+  [https://github.com/adjacentlink/emane/wiki](https://github.com/adjacentlink/emane/wiki)
   
   [https://github.com/adjacentlink/emane-tutorial](https://github.com/adjacentlink/emane-tutorial)
   
diff --git a/guide/site/preface.md b/guide/site/preface.md
index 16c3da8..9891848 100644
--- a/guide/site/preface.md
+++ b/guide/site/preface.md
@@ -87,7 +87,7 @@ referenced the *emane-guide* are as follows:
   there may be material in the wiki and tutorial that is not yet
   included in this guide.
 
-  [https://https://github.com/adjacentlink/emane/wiki](https://https://github.com/adjacentlink/emane/wiki)
+  [https://github.com/adjacentlink/emane/wiki](https://github.com/adjacentlink/emane/wiki)
   
   [https://github.com/adjacentlink/emane-tutorial](https://github.com/adjacentlink/emane-tutorial)