diff --git a/src/validation.h b/src/validation.h
--- a/src/validation.h
+++ b/src/validation.h
@@ -943,6 +943,8 @@
     void InvalidBlockFound(CBlockIndex *pindex,
                            const BlockValidationState &state)
         EXCLUSIVE_LOCKS_REQUIRED(cs_main);
+    void InvalidChainFound(CBlockIndex *pindexNew)
+        EXCLUSIVE_LOCKS_REQUIRED(cs_main);
     CBlockIndex *FindMostWorkChain() EXCLUSIVE_LOCKS_REQUIRED(cs_main);
     bool MarkBlockAsFinal(const Config &config, BlockValidationState &state,
                           const CBlockIndex *pindex)
diff --git a/src/validation.cpp b/src/validation.cpp
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -929,8 +929,7 @@
     CheckForkWarningConditions();
 }
 
-static void InvalidChainFound(CBlockIndex *pindexNew)
-    EXCLUSIVE_LOCKS_REQUIRED(cs_main) {
+void CChainState::InvalidChainFound(CBlockIndex *pindexNew) {
     AssertLockHeld(cs_main);
     if (!pindexBestInvalid ||
         pindexNew->nChainWork > pindexBestInvalid->nChainWork) {