diff --git a/src/.profile.d/make.sh b/src/.profile.d/make.sh
index f28f171..610c458 100644
--- a/src/.profile.d/make.sh
+++ b/src/.profile.d/make.sh
@@ -1,2 +1,3 @@
 #!/bin/sh
-alias make='make -s'
+# Assumes GNU/BSD make.
+alias make='make -s -j 4'