diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -181,6 +181,7 @@
 	chain.cpp
 	checkpoints.cpp
 	config.cpp
+	consensus/activation.cpp
 	globals.cpp
 	httprpc.cpp
 	httpserver.cpp
diff --git a/src/Makefile.am b/src/Makefile.am
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -111,6 +111,7 @@
   compat/sanity.h \
   compressor.h \
   config.h \
+  consensus/activation.h \
   consensus/consensus.h \
   core_io.h \
   core_memusage.h \
@@ -211,6 +212,7 @@
   chain.cpp \
   checkpoints.cpp \
   config.cpp \
+  consensus/activation.cpp \
   globals.cpp \
   httprpc.cpp \
   httpserver.cpp \
diff --git a/src/consensus/activation.h b/src/consensus/activation.h
new file mode 100644
--- /dev/null
+++ b/src/consensus/activation.h
@@ -0,0 +1,28 @@
+// Copyright (c) 2018 The Bitcoin developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_CONSENSUS_ACTIVATION_H
+#define BITCOIN_CONSENSUS_ACTIVATION_H
+
+#include <cstdint>
+
+class CBlockIndex;
+class Config;
+
+/** Check if UAHF has activated. */
+bool IsUAHFenabled(const Config &config, const CBlockIndex *pindexPrev);
+
+/** Check if DAA HF has activated. */
+bool IsDAAEnabled(const Config &config, const CBlockIndex *pindexPrev);
+
+/** Check if Nov 15, 2018 HF has activated. */
+bool IsMagneticAnomalyEnabled(const Config &config,
+                              const CBlockIndex *pindexPrev);
+/**
+ * Also check if Nov 15, 2018 HF has activated, but with an API that isn't as
+ * safe.
+ */
+bool IsMagneticAnomalyEnabled(const Config &config, int64_t nMedianTimePast);
+
+#endif // BITCOIN_CONSENSUS_ACTIVATION_H
diff --git a/src/consensus/activation.cpp b/src/consensus/activation.cpp
new file mode 100644
--- /dev/null
+++ b/src/consensus/activation.cpp
@@ -0,0 +1,50 @@
+// Copyright (c) 2018 The Bitcoin developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include "activation.h"
+
+#include "chain.h"
+#include "chainparams.h"
+#include "config.h"
+#include "util.h"
+
+static bool IsUAHFenabled(const Config &config, int nHeight) {
+    return nHeight >= config.GetChainParams().GetConsensus().uahfHeight;
+}
+
+bool IsUAHFenabled(const Config &config, const CBlockIndex *pindexPrev) {
+    if (pindexPrev == nullptr) {
+        return false;
+    }
+
+    return IsUAHFenabled(config, pindexPrev->nHeight);
+}
+
+static bool IsDAAEnabled(const Config &config, int nHeight) {
+    return nHeight >= config.GetChainParams().GetConsensus().daaHeight;
+}
+
+bool IsDAAEnabled(const Config &config, const CBlockIndex *pindexPrev) {
+    if (pindexPrev == nullptr) {
+        return false;
+    }
+
+    return IsDAAEnabled(config, pindexPrev->nHeight);
+}
+
+bool IsMagneticAnomalyEnabled(const Config &config, int64_t nMedianTimePast) {
+    return nMedianTimePast >= gArgs.GetArg("-magneticanomalyactivationtime",
+                                           config.GetChainParams()
+                                               .GetConsensus()
+                                               .magneticAnomalyActivationTime);
+}
+
+bool IsMagneticAnomalyEnabled(const Config &config,
+                              const CBlockIndex *pindexPrev) {
+    if (pindexPrev == nullptr) {
+        return false;
+    }
+
+    return IsMagneticAnomalyEnabled(config, pindexPrev->GetMedianTimePast());
+}
diff --git a/src/miner.cpp b/src/miner.cpp
--- a/src/miner.cpp
+++ b/src/miner.cpp
@@ -10,6 +10,7 @@
 #include "chainparams.h"
 #include "coins.h"
 #include "config.h"
+#include "consensus/activation.h"
 #include "consensus/consensus.h"
 #include "consensus/merkle.h"
 #include "consensus/validation.h"
diff --git a/src/pow.cpp b/src/pow.cpp
--- a/src/pow.cpp
+++ b/src/pow.cpp
@@ -10,11 +10,11 @@
 #include "chain.h"
 #include "chainparams.h"
 #include "config.h"
+#include "consensus/activation.h"
 #include "consensus/params.h"
 #include "primitives/block.h"
 #include "uint256.h"
 #include "util.h"
-#include "validation.h"
 
 /**
  * Compute the next required proof of work using the legacy Bitcoin difficulty
diff --git a/src/validation.h b/src/validation.h
--- a/src/validation.h
+++ b/src/validation.h
@@ -437,16 +437,6 @@
 /** Prune block files up to a given height */
 void PruneBlockFilesManual(int nPruneUpToHeight);
 
-/** Check if UAHF has activated. */
-bool IsUAHFenabled(const Config &config, const CBlockIndex *pindexPrev);
-
-/** Check if DAA HF has activated. */
-bool IsDAAEnabled(const Config &config, const CBlockIndex *pindexPrev);
-
-/** Check if Nov 15, 2018 HF has activated. */
-bool IsMagneticAnomalyEnabled(const Config &config,
-                              const CBlockIndex *pindexPrev);
-
 /**
  * (try to) add transaction to memory pool
  */
diff --git a/src/validation.cpp b/src/validation.cpp
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -13,6 +13,7 @@
 #include "checkpoints.h"
 #include "checkqueue.h"
 #include "config.h"
+#include "consensus/activation.h"
 #include "consensus/consensus.h"
 #include "consensus/merkle.h"
 #include "consensus/validation.h"
@@ -540,47 +541,6 @@
     return true;
 }
 
-static bool IsUAHFenabled(const Config &config, int nHeight) {
-    return nHeight >= config.GetChainParams().GetConsensus().uahfHeight;
-}
-
-bool IsUAHFenabled(const Config &config, const CBlockIndex *pindexPrev) {
-    if (pindexPrev == nullptr) {
-        return false;
-    }
-
-    return IsUAHFenabled(config, pindexPrev->nHeight);
-}
-
-static bool IsDAAEnabled(const Config &config, int nHeight) {
-    return nHeight >= config.GetChainParams().GetConsensus().daaHeight;
-}
-
-bool IsDAAEnabled(const Config &config, const CBlockIndex *pindexPrev) {
-    if (pindexPrev == nullptr) {
-        return false;
-    }
-
-    return IsDAAEnabled(config, pindexPrev->nHeight);
-}
-
-static bool IsMagneticAnomalyEnabled(const Config &config,
-                                     int64_t nMedianTimePast) {
-    return nMedianTimePast >= gArgs.GetArg("-magneticanomalyactivationtime",
-                                           config.GetChainParams()
-                                               .GetConsensus()
-                                               .magneticAnomalyActivationTime);
-}
-
-bool IsMagneticAnomalyEnabled(const Config &config,
-                              const CBlockIndex *pindexPrev) {
-    if (pindexPrev == nullptr) {
-        return false;
-    }
-
-    return IsMagneticAnomalyEnabled(config, pindexPrev->GetMedianTimePast());
-}
-
 static bool IsMagneticAnomalyEnabledForCurrentBlock(const Config &config) {
     AssertLockHeld(cs_main);
     return IsMagneticAnomalyEnabled(config, chainActive.Tip());