X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fbook.cpp;h=091767b3ae7c566ee691f1b44f0c3549d8ee52ac;hp=d6dcf6cb3c8bd84798c5551ef92396f0b051c901;hb=076b62310ee874adb38d2c9610aad163db65e2e8;hpb=04108d45414c70c796d9378b247207b574e22414

diff --git a/src/book.cpp b/src/book.cpp
index d6dcf6cb..091767b3 100644
--- a/src/book.cpp
+++ b/src/book.cpp
@@ -508,7 +508,7 @@ int Book::find_entry(uint64_t key) {
 BookEntry Book::read_entry(int idx) {
 
   assert(idx >= 0 && idx < bookSize);
-  assert(is_open());
+  assert(bookFile.is_open());
 
   BookEntry e;