1 files changed, 1 insertions, 0 deletions
diff --git a/wscript b/wscript
index 49279094..b89286b5 100644
--- a/wscript
+++ b/wscript
@@ -79,6 +79,7 @@ def configure(conf):
 
     # Check for posix_memalign (OSX, amazingly, doesn't have it)
     conf.check(function_name='posix_memalign',
+               defines='_POSIX_SOURCE=1',
                header_name='stdlib.h',
                define_name='HAVE_POSIX_MEMALIGN',
                mandatory=False)