diff --git a/MagickCore/blob.c b/MagickCore/blob.c
index b12daf1..b2a2e5c 100644
--- a/MagickCore/blob.c
+++ b/MagickCore/blob.c
@@ -41,6 +41,7 @@
   Include declarations.
 */
 #include "MagickCore/studio.h"
+#include "MagickCore/nt-base-private.h"
 #include "MagickCore/blob.h"
 #include "MagickCore/blob-private.h"
 #include "MagickCore/cache.h"