1 files changed, 2 insertions, 1 deletions
diff --git a/ecb.h b/ecb.h
index 36f04fd..75f1237 100644
--- a/ecb.h
+++ b/ecb.h
@@ -88,7 +88,8 @@
     #define ECB_MEMORY_FENCE         do { } while (0)
     #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
     #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
-  #elif defined(_WIN32) && defined(MemoryBarrier)
+  #elif defined(_WIN32)
+    #include <WinNT.h>
     #define ECB_MEMORY_FENCE         MemoryBarrier ()
     #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
     #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE