diff --git a/src/txmempool.cpp b/src/txmempool.cpp
index 502a27dc6b..05b22bb39b 100644
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -74,6 +74,24 @@ private:
     const LockPoints& lp;
 };
 
+bool TestLockPointValidity(CChain& active_chain, const LockPoints* lp)
+{
+    AssertLockHeld(cs_main);
+    assert(lp);
+    // If there are relative lock times then the maxInputBlock will be set
+    // If there are no relative lock times, the LockPoints don't depend on the chain
+    if (lp->maxInputBlock) {
+        // Check whether active_chain is an extension of the block at which the LockPoints
+        // calculation was valid.  If not LockPoints are no longer valid
+        if (!active_chain.Contains(lp->maxInputBlock)) {
+            return false;
+        }
+    }
+
+    // LockPoints still valid
+    return true;
+}
+
 CTxMemPoolEntry::CTxMemPoolEntry(const CTransactionRef& tx, CAmount fee,
                                  int64_t time, unsigned int entry_height,
                                  bool spends_coinbase, int64_t sigops_cost, LockPoints lp)
diff --git a/src/txmempool.h b/src/txmempool.h
index 85417ac3fc..412c2fbb74 100644
--- a/src/txmempool.h
+++ b/src/txmempool.h
@@ -14,6 +14,7 @@
 #include <utility>
 #include <vector>
 
+#include <chain.h>
 #include <coins.h>
 #include <consensus/amount.h>
 #include <indirectmap.h>
@@ -49,6 +50,11 @@ struct LockPoints {
     CBlockIndex* maxInputBlock{nullptr};
 };
 
+/**
+ * Test whether the LockPoints height and time are still valid on the current chain
+ */
+bool TestLockPointValidity(CChain& active_chain, const LockPoints* lp) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
+
 struct CompareIteratorByHash {
     // SFINAE for T where T is either a pointer type (e.g., a txiter) or a reference_wrapper<T>
     // (e.g. a wrapped CTxMemPoolEntry&)
diff --git a/src/validation.cpp b/src/validation.cpp
index c96adb77ff..322e77afe6 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -212,24 +212,6 @@ bool CheckFinalTx(const CBlockIndex* active_chain_tip, const CTransaction &tx, i
     return IsFinalTx(tx, nBlockHeight, nBlockTime);
 }
 
-bool TestLockPointValidity(CChain& active_chain, const LockPoints* lp)
-{
-    AssertLockHeld(cs_main);
-    assert(lp);
-    // If there are relative lock times then the maxInputBlock will be set
-    // If there are no relative lock times, the LockPoints don't depend on the chain
-    if (lp->maxInputBlock) {
-        // Check whether active_chain is an extension of the block at which the LockPoints
-        // calculation was valid.  If not LockPoints are no longer valid
-        if (!active_chain.Contains(lp->maxInputBlock)) {
-            return false;
-        }
-    }
-
-    // LockPoints still valid
-    return true;
-}
-
 bool CheckSequenceLocks(CBlockIndex* tip,
                         const CCoinsView& coins_view,
                         const CTransaction& tx,
diff --git a/src/validation.h b/src/validation.h
index 21cd389757..a81188b5f2 100644
--- a/src/validation.h
+++ b/src/validation.h
@@ -249,11 +249,6 @@ PackageMempoolAcceptResult ProcessNewPackage(CChainState& active_chainstate, CTx
  */
 bool CheckFinalTx(const CBlockIndex* active_chain_tip, const CTransaction &tx, int flags = -1) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
 
-/**
- * Test whether the LockPoints height and time are still valid on the current chain
- */
-bool TestLockPointValidity(CChain& active_chain, const LockPoints* lp) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
-
 /**
  * Check if transaction will be BIP68 final in the next block to be created on top of tip.
  * @param[in]   tip             Chain tip to check tx sequence locks against. For example,