diff --git a/admin/acinclude.m4.in b/admin/acinclude.m4.in
index 29f506c..69c5256 100644
--- a/admin/acinclude.m4.in
+++ b/admin/acinclude.m4.in
@@ -1817,7 +1817,7 @@ fi
 
 if test -z "$1"; then
 
-kde_incdirs="$kde_libs_prefix/include /usr/lib/kde/include /usr/local/kde/include /usr/local/include /usr/kde/include /usr/include/kde /usr/include /opt/kde3/include /opt/kde/include $x_includes $qt_includes"
+kde_incdirs="$kde_libs_prefix/include /opt/kde3/include/kde /usr/lib/kde/include /usr/local/kde/include /usr/local/include /usr/kde/include /usr/include/kde /usr/include /opt/kde3/include /opt/kde/include $x_includes $qt_includes"
 test -n "$KDEDIR" && kde_incdirs="$KDEDIR/include $KDEDIR/include/kde $KDEDIR $kde_incdirs"
 kde_incdirs="$ac_kde_includes $kde_incdirs"
 AC_FIND_FILE($kde_check_header, $kde_incdirs, kde_incdir)