diff --git a/profiles/desktop/make.defaults b/profiles/desktop/make.defaults
index b6888a4e..056475ad 100644
--- a/profiles/desktop/make.defaults
+++ b/profiles/desktop/make.defaults
@@ -28,7 +28,7 @@ PORTAGE_ELOG_SYSTEM="save"
 RUBY_TARGETS="ruby20"
 
 # cpu
-USE="${USE} custom-cflags graphite smp"
+USE="${USE} custom-cflags graphite mpi smp"
 
 # gpu
 USE="${USE} dri dri2 fbcon fbcondecor fbosd opengl webgl"
diff --git a/profiles/server/make.defaults b/profiles/server/make.defaults
index 33479ff4..19668078 100644
--- a/profiles/server/make.defaults
+++ b/profiles/server/make.defaults
@@ -29,7 +29,7 @@ RUBY_TARGETS="ruby20"
 PYTHON_TARGETS="python2_7 python3_2 python3_3"
 
 # cpu
-USE="${USE} custom-cflags smp"
+USE="${USE} custom-cflags mpi smp"
 
 # gpu
 #USE="${USE} dri dri2 fbcon fbcondecor fbosd opengl opencl vaapi"