diff --git a/invesalius/data/cy_my_types.pxd b/invesalius/data/cy_my_types.pxd
index 279edf8..13d6c6c 100644
--- a/invesalius/data/cy_my_types.pxd
+++ b/invesalius/data/cy_my_types.pxd
@@ -13,4 +13,9 @@ ctypedef np.uint8_t mask_t
 
 ctypedef np.float32_t vertex_t
 ctypedef np.float32_t normal_t
-ctypedef np.int_t vertex_id_t
+
+# To compile in windows 64
+IF UNAME_MACHINE == 'AMD64':
+    ctypedef np.int64_t vertex_id_t
+ELSE:
+    ctypedef np.int_t vertex_id_t
--
libgit2 0.21.2