diff --git a/wscript b/wscript
index a3bb55c..34ebe73 100644
--- a/wscript
+++ b/wscript
@@ -40,8 +40,8 @@ def configure(conf):
   conf.env.DEFINES_P2T = ['P2T']
   conf.env.LIB_P2T = sys_libs
   if sys.platform == 'darwin':
-    conf.env.FRAMEWORK = ['OpenGL', 'Cocoa']
+    conf.env.FRAMEWORK = ['OpenGL', 'Cocoa', 'IOKit']
 
 def build(bld):
   print('  building')
-  bld.program(features = 'cxx cxxprogram', source=CPP_SOURCES, target = 'p2t', uselib = 'P2T')
\ No newline at end of file
+  bld.program(features = 'cxx cxxprogram', source=CPP_SOURCES, target = 'p2t', uselib = 'P2T')