--- libs/python/src/converter/builtin_converters.cpp	2012-12-07 11:51:06.000000000 -0800
+++ libs/python/src/converter/builtin_converters.cpp	2014-04-01 17:24:37.000000000 -0700
@@ -32,7 +32,9 @@
 
 void shared_ptr_deleter::operator()(void const*)
 {
+    PyGILState_STATE gil = PyGILState_Ensure();
     owner.reset();
+    PyGILState_Release(gil);
 }
 
 namespace
