diff --git a/frontend.h b/frontend.h
index 5ac3cf8a..bcf2ad00 100644
--- a/frontend.h
+++ b/frontend.h
@@ -215,7 +215,7 @@ void EnableNamedMenuItem P((char *menuRef, int state));
 typedef struct FrontEndProgramStats_TAG {
     int which;
     int depth;
-    unsigned long nodes;
+    u64 nodes;
     int score;
     int time;
     char * pv;