diff --git a/configure.ac b/configure.ac
index e3efb9d44..2cc96eaf9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -64,10 +64,6 @@ AC_SUBST([ABI_VERSION])
 AC_SUBST([ABI_REVISION])
 AC_SUBST([ABI_AGE])
 
-# directory for docs (html)
-hamlibdocdir=$datadir/doc/hamlib
-AC_SUBST([hamlibdocdir])
-
 # Add Hamlib header include paths
 AM_CPPFLAGS="${AM_CPPFLAGS} -I\$(top_srcdir)/include -I\$(top_srcdir)/src -I\$(top_srcdir)/lib"