diff --git a/src/init.c b/src/init.c
index 4fc5d602..13aba9b3 100644
--- a/src/init.c
+++ b/src/init.c
@@ -106,14 +106,14 @@ mi_heap_t _mi_heap_main = {
   MI_SMALL_PAGES_EMPTY,
   MI_PAGE_QUEUES_EMPTY,
   NULL,
-  0,
-  0,
+  0,      // thread id
 #if MI_INTPTR_SIZE==8   // the cookie of the main heap can be fixed (unlike page cookies that need to be secure!)
   0xCDCDCDCDCDCDCDCDUL,
 #else
   0xCDCDCDCDUL,
 #endif
-  0,
+  0,      // random
+  0,      // page count
   false   // can reclaim
 };