diff --git a/src/txmempool.h b/src/txmempool.h
index a7ecb6439..8a8039ded 100644
--- a/src/txmempool.h
+++ b/src/txmempool.h
@@ -20,7 +20,6 @@
 #include "sync.h"
 #include "random.h"
 
-#undef foreach
 #include "boost/multi_index_container.hpp"
 #include "boost/multi_index/ordered_index.hpp"
 #include "boost/multi_index/hashed_index.hpp"