diff --git a/Doc/mac/undoc.tex b/Doc/mac/undoc.tex
index 4192a02..9d3b763 100644
--- a/Doc/mac/undoc.tex
+++ b/Doc/mac/undoc.tex
@@ -73,7 +73,7 @@
 script is run under MacPython, as a MacPython applet or under OSX Python.
 
 \section{\module{Nav} --- NavServices calls}
-\declaremodule{standard}{Nac}
+\declaremodule{standard}{Nav}
   \platform{Mac}
 \modulesynopsis{Interface to Navigation Services.}