diff --git a/configure.ac b/configure.ac
index 1670c6976..56303e49d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -789,6 +789,9 @@ if test "x$COMPOSITE" = xauto; then
 		darwin*)
 			[ "x$XQUARTZ" = xyes -o "x$XQUARTZ" = xauto ] && COMPOSITE=no
 			;;
+		*)
+			COMPOSITE=yes
+			;;
 	esac
 fi