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-rw-r--r--src/serialize.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/serialize.h b/src/serialize.h
index cb3a3ea03c..c2bfa2780e 100644
--- a/src/serialize.h
+++ b/src/serialize.h
@@ -34,6 +34,7 @@ typedef unsigned long long uint64;
// Note that VirtualLock does not provide this as a guarantee on Windows,
// but, in practice, memory that has been VirtualLock'd almost never gets written to
// the pagefile except in rare circumstances where memory is extremely low.
+#include <windows.h>
#define mlock(p, n) VirtualLock((p), (n));
#define munlock(p, n) VirtualUnlock((p), (n));
#else