diff --git a/extern/bullet2/src/SConscript b/extern/bullet2/src/SConscript
index c1e859268b86d162fc7ab6f0a4572f6d0fec06d3..3bc2af7a1fdc4868c9ded7725526241a162cb336 100644
--- a/extern/bullet2/src/SConscript
+++ b/extern/bullet2/src/SConscript
@@ -19,7 +19,7 @@ elif env['OURPLATFORM'] in ('linux', 'freebsd4', 'freebsd5'):
     cflags += ['-O2']
 elif sys.platform=='darwin':
     defs += ' NDEBUG'
-    bt_cxx_flags = env['CXXFLAGS'] + ['-fPIC', '-msse3', '-mssse3', '-ffast-math']
+    bt_cxx_flags = env['CXXFLAGS'] + ['-O2', '-fPIC', '-msse3', '-mssse3', '-ffast-math']
 
 bullet2_src = env.Glob("LinearMath/*.cpp")
 bullet2_src += env.Glob("BulletCollision/BroadphaseCollision/*.cpp")