diff --git a/pylibs/__init__.py b/pylibs/__init__.py
index e69de29b..6710cfa7 100644
--- a/pylibs/__init__.py
+++ b/pylibs/__init__.py
@@ -0,0 +1 @@
+import patch_urandom_bug
diff --git a/pylibs/patch_urandom_bug.py b/pylibs/patch_urandom_bug.py
new file mode 100644
index 00000000..1eab2ce3
--- /dev/null
+++ b/pylibs/patch_urandom_bug.py
@@ -0,0 +1,23 @@
+
+import os
+
+if not hasattr(os, 'urandom'):
+    # There's some annoying bug with Vim builds on OS X that breaks os.urandom.
+    # To work around this we temporarily patch it out and then hack in a
+    # totally insecure version of os.urandom.
+
+    def raise_notimpl(*args):
+        """Force random to fallback to using time for a seed"""
+        raise NotImplementedError()
+    os.urandom = raise_notimpl
+
+    import random
+    import cStringIO
+
+    def crappy_urandom_for_macports_bug(n):
+        """Totally fail way of generating some random bytes"""
+        buf = cStringIO.StringIO()
+        for i in xrange(n):
+            buf.write(chr(random.randint(0, 255)))
+        return buf.getvalue()
+    os.urandom = crappy_urandom_for_macports_bug
diff --git a/pylibs/pymode/__init__.py b/pylibs/pymode/__init__.py
index e69de29b..6710cfa7 100644
--- a/pylibs/pymode/__init__.py
+++ b/pylibs/pymode/__init__.py
@@ -0,0 +1 @@
+import patch_urandom_bug
diff --git a/pylibs/ropevim.py b/pylibs/ropevim.py
index b2d150c4..4b3cc6d8 100644
--- a/pylibs/ropevim.py
+++ b/pylibs/ropevim.py
@@ -1,4 +1,5 @@
 """ropevim, a vim mode for using rope refactoring library"""
+import patch_urandom_bug
 import glob
 import os
 import tempfile