diff --git a/plot/Makefile.am b/plot/Makefile.am
index 9d18475..c9fb5af 100644
--- a/plot/Makefile.am
+++ b/plot/Makefile.am
@@ -1,2 +1,2 @@
-ACLOCAL_AMFLAGS = -I m4 -I /usr/local/share/aclocal
+ACLOCAL_AMFLAGS = -I m4 -I /usr/share/aclocal
 SUBDIRS=src include
diff --git a/plot/configure.ac b/plot/configure.ac
index 1392b6e..186d4fa 100644
--- a/plot/configure.ac
+++ b/plot/configure.ac
@@ -2,6 +2,7 @@ AC_PREREQ([2.68])
 AC_INIT([plot],[0.6],[udo.eisenbarth@arcor.de],[],[http://lasercalc.sourceforge.net])
 AM_INIT_AUTOMAKE([-Wall -Werror])
 LT_PREREQ([2.4.2])
+AM_PROG_AR
 LT_INIT([dlopen])
 AC_CONFIG_SRCDIR([src/Vector3D.cpp])
 AC_CONFIG_MACRO_DIR([m4])
@@ -24,7 +25,7 @@ if test "$wxWin" != 1; then
 		wxWidgets version is $reqwx or above.
 		])
 fi
-CPPFLAGS="-D__GXX_EXPERIMENTAL_CXX0X__ $WX_CPPFLAGS -I/usr/local/include"
+CPPFLAGS="$WX_CPPFLAGS $CPPFLAGS"
 AC_ARG_ENABLE(debug,
 [[  --enable-debug   use debug configuration]],
 [