diff --git a/include/boost/detail/quick_allocator.hpp b/include/boost/detail/quick_allocator.hpp
index 7c19d0f..ddb0a76 100644
--- a/include/boost/detail/quick_allocator.hpp
+++ b/include/boost/detail/quick_allocator.hpp
@@ -173,7 +173,7 @@ template<unsigned size, unsigned align_> struct allocator_impl
 #ifdef BOOST_HAS_THREADS
 
 template<unsigned size, unsigned align_>
-  lightweight_mutex allocator_impl<size, align_>::mutex_init = &lightweight_mutex allocator_impl<size, align_>::mutex();
+  lightweight_mutex * allocator_impl<size, align_>::mutex_init = &allocator_impl<size, align_>::mutex();
 
 #endif