diff --git a/src/hash.h b/src/hash.h
index 6615710..ef4e3d8 100644
--- a/src/hash.h
+++ b/src/hash.h
@@ -14,7 +14,7 @@
 #ifndef HASH_H
 #define HASH_H
 
-#include <bug.h>
+//#include <bug.h>
 
 #include "chessdefs.h"
 
@@ -121,7 +121,7 @@ bool zobrist_verify(pos_t *pos);
  */
 static inline void tt_prefetch(hkey_t key)
 {
-    bug_on(!hash_tt.keys);
+//    bug_on(!hash_tt.keys);
     __builtin_prefetch(hash_tt.keys + (key & hash_tt.mask));
 }
 
diff --git a/src/position.h b/src/position.h
index a3eeb67..5676430 100644
--- a/src/position.h
+++ b/src/position.h
@@ -19,7 +19,7 @@
 #include <brlib.h>
 #include <bitops.h>
 #include <struct-group.h>
-#include <bug.h>
+// #include <bug.h>
 
 #include "chessdefs.h"
 #include "hash.h"
diff --git a/src/util.h b/src/util.h
index 94a1e02..d3d6d5e 100644
--- a/src/util.h
+++ b/src/util.h
@@ -17,8 +17,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-#include <bug.h>
-
 #include "chessdefs.h"
 
 #undef safe_malloc
@@ -29,6 +27,7 @@
 #pragma push_macro("BUG_ON")
 #undef BUG_ON
 #define BUG_ON
+#include <bug.h>
 
 #define safe_malloc(size) ({                   \
             void *_ret = malloc(size);         \