diff --git a/src/versionbits.cpp b/src/versionbits.cpp
index 62c0e754b96..0aac33ac6f3 100644
--- a/src/versionbits.cpp
+++ b/src/versionbits.cpp
@@ -189,36 +189,6 @@ int AbstractThresholdConditionChecker::GetStateSinceHeightFor(const CBlockIndex*
     return pindexPrev->nHeight + 1;
 }
 
-namespace
-{
-/**
- * Class to implement versionbits logic.
- */
-class VersionBitsConditionChecker : public AbstractThresholdConditionChecker {
-private:
-    const Consensus::BIP9Deployment& dep;
-
-protected:
-    int64_t BeginTime() const override { return dep.nStartTime; }
-    int64_t EndTime() const override { return dep.nTimeout; }
-    int MinActivationHeight() const override { return dep.min_activation_height; }
-    int Period() const override { return dep.period; }
-    int Threshold() const override { return dep.threshold; }
-
-    bool Condition(const CBlockIndex* pindex) const override
-    {
-        return (((pindex->nVersion & VERSIONBITS_TOP_MASK) == VERSIONBITS_TOP_BITS) && (pindex->nVersion & Mask()) != 0);
-    }
-
-public:
-    explicit VersionBitsConditionChecker(const Consensus::BIP9Deployment& dep) : dep{dep} {}
-    explicit VersionBitsConditionChecker(const Consensus::Params& params, Consensus::DeploymentPos id) : VersionBitsConditionChecker{params.vDeployments[id]} {}
-
-    uint32_t Mask() const { return (uint32_t{1}) << dep.bit; }
-};
-
-} // namespace
-
 BIP9Info VersionBitsCache::Info(const CBlockIndex& block_index, const Consensus::Params& params, Consensus::DeploymentPos id)
 {
     BIP9Info result;
diff --git a/src/versionbits_impl.h b/src/versionbits_impl.h
index b2526a0b4ec..a2a62d77ba2 100644
--- a/src/versionbits_impl.h
+++ b/src/versionbits_impl.h
@@ -49,4 +49,30 @@ public:
     int GetStateSinceHeightFor(const CBlockIndex* pindexPrev, ThresholdConditionCache& cache) const;
 };
 
+/**
+ * Class to implement versionbits logic.
+ */
+class VersionBitsConditionChecker : public AbstractThresholdConditionChecker {
+private:
+    const Consensus::BIP9Deployment& dep;
+
+protected:
+    int64_t BeginTime() const override { return dep.nStartTime; }
+    int64_t EndTime() const override { return dep.nTimeout; }
+    int MinActivationHeight() const override { return dep.min_activation_height; }
+    int Period() const override { return dep.period; }
+    int Threshold() const override { return dep.threshold; }
+
+    bool Condition(const CBlockIndex* pindex) const override
+    {
+        return (((pindex->nVersion & VERSIONBITS_TOP_MASK) == VERSIONBITS_TOP_BITS) && (pindex->nVersion & Mask()) != 0);
+    }
+
+public:
+    explicit VersionBitsConditionChecker(const Consensus::BIP9Deployment& dep) : dep{dep} {}
+    explicit VersionBitsConditionChecker(const Consensus::Params& params, Consensus::DeploymentPos id) : VersionBitsConditionChecker{params.vDeployments[id]} {}
+
+    uint32_t Mask() const { return (uint32_t{1}) << dep.bit; }
+};
+
 #endif // BITCOIN_VERSIONBITS_IMPL_H