diff --git a/configure.ac b/configure.ac
index 61857aaf..76f0649f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -85,8 +85,6 @@ ALL_LINGUAS="ca cs_CZ de el es fa fr gl hr hu id it ja nb_NO nl pa pl pt_BR ru s
 AC_SUBST([GETTEXT_PACKAGE])
 AC_SUBST([ALL_LINGUAS])
 
-AC_PREFIX_DEFAULT(/usr)
-
 dnl output files
 AC_CONFIG_FILES([
     Makefile
diff --git a/m4/acinclude.m4 b/m4/acinclude.m4
index 3cb96e65..0c711739 100644
--- a/m4/acinclude.m4
+++ b/m4/acinclude.m4
@@ -13,7 +13,7 @@ AC_DEFUN([AS_AC_EXPAND],
   prefix_save=$prefix
   exec_prefix_save=$exec_prefix
 
-  dnl if no prefix given, then use /usr, the default prefix
+  dnl if no prefix given, then use /usr/local, the default prefix
   if test "x$prefix" = "xNONE"; then
     prefix=$ac_default_prefix
   fi