diff --git a/src/txmempool.h b/src/txmempool.h
--- a/src/txmempool.h
+++ b/src/txmempool.h
@@ -53,8 +53,6 @@
     LockPoints() : height(0), time(0), maxInputBlock(nullptr) {}
 };
 
-class CTxMemPool;
-
 /** \class CTxMemPoolEntry
  *
  * CTxMemPoolEntry stores data about the corresponding transaction, as well as