diff --git a/acinclude.m4 b/acinclude.m4
index 05d3d7ccd..c2f1f9c05 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -580,15 +580,25 @@ fi
 case "$BOXMODEL" in
 	vusolo4k|vuduo4k|vuultimo4k|vuuno4k|vuuno4kse|vuzero4k|vuduo)
 		AC_DEFINE(BOXMODEL_VUPLUS, 1, [vuplus])
+		vuplus=true
+	;;
+	*)
+		vuplus=false
 	;;
 esac
+AM_CONDITIONAL(BOXMODEL_VUPLUS, test "$vuplus" = "true")
 
 # all vuplus4k BOXMODELs
 case "$BOXMODEL" in
 	vusolo4k|vuduo4k|vuultimo4k|vuuno4k|vuuno4kse|vuzero4k)
 		AC_DEFINE(BOXMODEL_VUPLUS4K, 1, [vuplus4k])
+		vuplus4k=true
+	;;
+	*)
+		vuplus4k=false
 	;;
 esac
+AM_CONDITIONAL(BOXMODEL_VUPLUS4K, test "$vuplus4k" = "true")
 
 # BOXMODELs that allows to change osd resolution
 case "$BOXMODEL" in