diff --git a/circle.yml b/circle.yml
index cc494905..478775b7 100644
--- a/circle.yml
+++ b/circle.yml
@@ -1,7 +1,3 @@
-machine:
-  environment:
-    CFLAGS: -O0   # for faster compilation, will preserve warnings
-
 dependencies:
   override:
     - sudo dpkg --add-architecture i386