diff --git a/MagickCore/blob-private.h b/MagickCore/blob-private.h
index ba3bba6..13cc366 100644
--- a/MagickCore/blob-private.h
+++ b/MagickCore/blob-private.h
@@ -22,6 +22,8 @@
 extern "C" {
 #endif
 
+#include "MagickCore/nt-base-private.h"
+
 #define MagickMinBlobExtent  32767L
 #if defined(MAGICKCORE_HAVE_FSEEKO)
 # define fseek  fseeko