diff --git a/src/txmempool.h b/src/txmempool.h
--- a/src/txmempool.h
+++ b/src/txmempool.h
@@ -322,6 +322,15 @@
     }
 };
 
+struct update_lock_points {
+    explicit update_lock_points(const LockPoints &_lp) : lp(_lp) {}
+
+    void operator()(CTxMemPoolEntry &e) { e.UpdateLockPoints(lp); }
+
+private:
+    const LockPoints &lp;
+};
+
 // Multi_index tag names
 struct descendant_score {};
 struct entry_time {};
diff --git a/src/txmempool.cpp b/src/txmempool.cpp
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -73,15 +73,6 @@
     Amount feeDelta;
 };
 
-struct update_lock_points {
-    explicit update_lock_points(const LockPoints &_lp) : lp(_lp) {}
-
-    void operator()(CTxMemPoolEntry &e) { e.UpdateLockPoints(lp); }
-
-private:
-    const LockPoints &lp;
-};
-
 bool TestLockPointValidity(const CChain &active_chain, const LockPoints &lp) {
     AssertLockHeld(cs_main);
     // If there are relative lock times then the maxInputBlock will be set