diff --git a/docs/index.html b/docs/index.html
index 8dcb5d2..c1bdc24 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -98,7 +98,7 @@ come in a predictible order to be parsable by <em>StreamDevice</em>.
 IOC Application Developer's Guide:
 <a href="https://epics.anl.gov/base/R3-14/12-docs/AppDevGuide/"
 target="ex">R3.14.12</a>,
-<a href="https://epics.anl.gov/base/R3-15/5-docs/AppDevGuide/AppDevGuide.html"
+<a href="https://epics.anl.gov/base/R3-15/6-docs/AppDevGuide/AppDevGuide.html"
 target="ex">R3.15.5</a>,
 <a href="https://epics.anl.gov/base/R3-16/1-docs/AppDevGuide/AppDevGuide.html"
 target="ex">R3.16.1</a>