diff --git a/envsetup.sh b/envsetup.sh
index e85aab6..a8f2d4d 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -150,9 +150,6 @@
     setpaths
     set_sequence_number
 
-    # Don't try to do preoptimization until it works better on OSX.
-    export DISABLE_DEXPREOPT=true
-
     export ANDROID_BUILD_TOP=$(gettop)
 }