diff --git a/include/pybind11/cast.h b/include/pybind11/cast.h
index f36b3d5a6..654ef04d8 100644
--- a/include/pybind11/cast.h
+++ b/include/pybind11/cast.h
@@ -34,6 +34,20 @@ private:
 
 NAMESPACE_BEGIN(detail)
 
+/// Convert from any type pointer to another avoding warnings about void* vs (void*()) incompatibility.
+template<typename A, typename B>
+A cast_any_ptr(B x) { return reinterpret_cast<A>(reinterpret_cast<uintptr_t>(x)); }
+
+/// Return (*)(Args...) -> void*
+template <typename Return, typename... Args>
+void * func_to_voidp(Return (*f)(Args...)) { return cast_any_ptr<void*>(f); }
+
+/// void* -> Return (*)(Args...)
+template <typename Return, typename... Args>
+Return (*voidp_to_func(void * f))(Args...) { return cast_any_ptr<Return (*)(Args...)>(f); }
+
+
+
 /// Additional type information which does not fit into the PyTypeObject
 struct type_info {
     PyTypeObject *type;
diff --git a/include/pybind11/numpy.h b/include/pybind11/numpy.h
index 3386876e5..8f1030a92 100644
--- a/include/pybind11/numpy.h
+++ b/include/pybind11/numpy.h
@@ -56,11 +56,11 @@ public:
             void **api_ptr = (void **) (c ? PyCObject_AsVoidPtr(c.ptr()) : nullptr);
 #endif
             API api;
-            api.PyArray_Type_          = (decltype(api.PyArray_Type_))          api_ptr[API_PyArray_Type];
-            api.PyArray_DescrFromType_ = (decltype(api.PyArray_DescrFromType_)) api_ptr[API_PyArray_DescrFromType];
-            api.PyArray_FromAny_       = (decltype(api.PyArray_FromAny_))       api_ptr[API_PyArray_FromAny];
-            api.PyArray_NewCopy_       = (decltype(api.PyArray_NewCopy_))       api_ptr[API_PyArray_NewCopy];
-            api.PyArray_NewFromDescr_  = (decltype(api.PyArray_NewFromDescr_))  api_ptr[API_PyArray_NewFromDescr];
+            api.PyArray_Type_          = detail::cast_any_ptr<decltype(api.PyArray_Type_)>          (api_ptr[API_PyArray_Type]);
+            api.PyArray_DescrFromType_ = detail::cast_any_ptr<decltype(api.PyArray_DescrFromType_)> (api_ptr[API_PyArray_DescrFromType]);
+            api.PyArray_FromAny_       = detail::cast_any_ptr<decltype(api.PyArray_FromAny_)>       (api_ptr[API_PyArray_FromAny]);
+            api.PyArray_NewCopy_       = detail::cast_any_ptr<decltype(api.PyArray_NewCopy_)>       (api_ptr[API_PyArray_NewCopy]);
+            api.PyArray_NewFromDescr_  = detail::cast_any_ptr<decltype(api.PyArray_NewFromDescr_)>  (api_ptr[API_PyArray_NewFromDescr]);
             return api;
         }
 
diff --git a/include/pybind11/pybind11.h b/include/pybind11/pybind11.h
index 84510f19a..862f3d5b8 100644
--- a/include/pybind11/pybind11.h
+++ b/include/pybind11/pybind11.h
@@ -49,7 +49,7 @@ public:
     template <typename Return, typename... Args, typename... Extra>
     cpp_function(Return (*f)(Args...), const Extra&... extra) {
         auto rec = new detail::function_record();
-        rec->data = (void *) f;
+        rec->data = detail::func_to_voidp(f);
 
         typedef arg_value_caster<Args...> cast_in;
         typedef return_value_caster<Return> cast_out;
@@ -67,7 +67,7 @@ public:
 
             /* Do the call and convert the return value back into the Python domain */
             handle result = cast_out::cast(
-                args.template call<Return>((Return (*) (Args...)) rec->data),
+                args.template call<Return>(detail::voidp_to_func<Return,Args...>(rec->data)),
                 rec->policy, parent);
 
             /* Invoke call policy post-call hook */