diff --git a/src/crypto/slow-hash.c b/src/crypto/slow-hash.c
index d7dcbd274..35e98f2f5 100644
--- a/src/crypto/slow-hash.c
+++ b/src/crypto/slow-hash.c
@@ -524,7 +524,7 @@ void slow_hash_free_state(void)
     else
     {
 #if defined(_MSC_VER) || defined(__MINGW32__)
-        VirtualFree(hp_state, MEMORY, MEM_RELEASE);
+        VirtualFree(hp_state, 0, MEM_RELEASE);
 #else
         munmap(hp_state, MEMORY);
 #endif