diff --git a/src/init.cpp b/src/init.cpp
index ece6214aa8..bcc3d83af8 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -74,6 +74,7 @@
 #include <boost/algorithm/string/classification.hpp>
 #include <boost/algorithm/string/replace.hpp>
 #include <boost/algorithm/string/split.hpp>
+#include <boost/signals2/signal.hpp>
 #include <boost/thread.hpp>
 
 #if ENABLE_ZMQ
diff --git a/src/interfaces/node.cpp b/src/interfaces/node.cpp
index 8a64a9d26a..b720a63017 100644
--- a/src/interfaces/node.cpp
+++ b/src/interfaces/node.cpp
@@ -37,6 +37,8 @@
 
 #include <univalue.h>
 
+#include <boost/signals2/signal.hpp>
+
 class CWallet;
 fs::path GetWalletDir();
 std::vector<fs::path> ListWalletDir();
diff --git a/src/txmempool.cpp b/src/txmempool.cpp
index f04f13e6e0..47b0d39ea4 100644
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -355,7 +355,6 @@ void CTxMemPool::AddTransactionsUpdated(unsigned int n)
 
 void CTxMemPool::addUnchecked(const CTxMemPoolEntry &entry, setEntries &setAncestors, bool validFeeEstimate)
 {
-    NotifyEntryAdded(entry.GetSharedTx());
     // Add to memory pool without checking anything.
     // Used by AcceptToMemoryPool(), which DOES do
     // all the appropriate checks.
@@ -406,14 +405,12 @@ void CTxMemPool::addUnchecked(const CTxMemPoolEntry &entry, setEntries &setAnces
 
 void CTxMemPool::removeUnchecked(txiter it, MemPoolRemovalReason reason)
 {
-    CTransactionRef ptx = it->GetSharedTx();
-    NotifyEntryRemoved(ptx, reason);
     if (reason != MemPoolRemovalReason::BLOCK) {
         // Notify clients that a transaction has been removed from the mempool
         // for any reason except being included in a block. Clients interested
         // in transactions included in blocks can subscribe to the BlockConnected
         // notification.
-        GetMainSignals().TransactionRemovedFromMempool(ptx);
+        GetMainSignals().TransactionRemovedFromMempool(it->GetSharedTx());
     }
 
     const uint256 hash = it->GetTx().GetHash();
diff --git a/src/txmempool.h b/src/txmempool.h
index de11d626b4..38a4667b31 100644
--- a/src/txmempool.h
+++ b/src/txmempool.h
@@ -27,7 +27,6 @@
 #include <boost/multi_index/hashed_index.hpp>
 #include <boost/multi_index/ordered_index.hpp>
 #include <boost/multi_index/sequenced_index.hpp>
-#include <boost/signals2/signal.hpp>
 
 class CBlockIndex;
 extern RecursiveMutex cs_main;
@@ -699,9 +698,6 @@ public:
 
     size_t DynamicMemoryUsage() const;
 
-    boost::signals2::signal<void (CTransactionRef)> NotifyEntryAdded;
-    boost::signals2::signal<void (CTransactionRef, MemPoolRemovalReason)> NotifyEntryRemoved;
-
 private:
     /** UpdateForDescendants is used by UpdateTransactionsFromBlock to update
      *  the descendants for a single transaction that has been added to the