diff --git a/Build-OSX.md b/Build-OSX.md
index 322995b..00afa50 100644
--- a/Build-OSX.md
+++ b/Build-OSX.md
@@ -22,7 +22,7 @@ ccliffe$ cd liquid-dsp
 liquid-dsp$ ./bootstrap.sh
 liquid-dsp$ ./configure
 .. configuring ..
-liquid-dsp$ make
+liquid-dsp$ make -j4
 .. building ..
 liquid-dsp$ sudo make install
 .. installing ..