diff --git a/src/Makefile.am b/src/Makefile.am
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -230,6 +230,7 @@
   util/bitmanip.h \
   util/bytevectorhash.h \
   util/check.h \
+  util/macros.h \
   util/moneystr.h \
   util/system.h \
   util/threadnames.h \
diff --git a/src/sync.h b/src/sync.h
--- a/src/sync.h
+++ b/src/sync.h
@@ -7,6 +7,7 @@
 #define BITCOIN_SYNC_H
 
 #include <threadsafety.h>
+#include <util/macros.h>
 
 #include <condition_variable>
 #include <mutex>
@@ -173,9 +174,6 @@
 using DebugLock = UniqueLock<typename std::remove_reference<
     typename std::remove_pointer<MutexArg>::type>::type>;
 
-#define PASTE(x, y) x##y
-#define PASTE2(x, y) PASTE(x, y)
-
 #define LOCK(cs)                                                               \
     DebugLock<decltype(cs)> PASTE2(criticalblock,                              \
                                    __COUNTER__)(cs, #cs, __FILE__, __LINE__)
diff --git a/src/util/macros.h b/src/util/macros.h
new file mode 100644
--- /dev/null
+++ b/src/util/macros.h
@@ -0,0 +1,11 @@
+// Copyright (c) 2019 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_UTIL_MACROS_H
+#define BITCOIN_UTIL_MACROS_H
+
+#define PASTE(x, y) x##y
+#define PASTE2(x, y) PASTE(x, y)
+
+#endif // BITCOIN_UTIL_MACROS_H