diff --git a/src/init.c b/src/init.c
index f5fa2ad8..5bdadabc 100644
--- a/src/init.c
+++ b/src/init.c
@@ -33,6 +33,9 @@ const mi_page_t _mi_page_empty = {
   MI_ATOMIC_VAR_INIT(0), // xthread_free
   MI_ATOMIC_VAR_INIT(0), // xheap
   NULL, NULL
+  #if MI_INTPTR_SIZE==4 
+  , { NULL }
+  #endif
 };
 
 #define MI_PAGE_EMPTY() ((mi_page_t*)&_mi_page_empty)