diff --git a/Changes b/Changes
index 3700be2b3..6240d3fd2 100644
--- a/Changes
+++ b/Changes
@@ -7,8 +7,7 @@ indicates the contributor was also the author of the fix; Thanks!
 
 ***   Add +1364-1995ext and similar language options, bug532.  [Jeremy Bennett]
 
-****  Fix svdpi compile issue on MSVCC, bug571.  [Amir Gonnen]
-
+****  Fix compile issues on MSVCC, bug571, bug577.  [Amir Gonnen]
 
 
 * Verilator 3.842 2012/11/03
diff --git a/include/verilated_save.cpp b/include/verilated_save.cpp
index e01b0d9fe..df12516a6 100644
--- a/include/verilated_save.cpp
+++ b/include/verilated_save.cpp
@@ -34,6 +34,13 @@
 # include <unistd.h>
 #endif
 
+#ifndef O_LARGEFILE // For example on WIN32
+# define O_LARGEFILE 0
+#endif
+#ifndef O_NONBLOCK
+# define O_NONBLOCK 0
+#endif
+
 // CONSTANTS
 static const char* VLTSAVE_HEADER_STR = "verilatorsave01\n";	///< Value of first bytes of each file
 static const char* VLTSAVE_TRAILER_STR = "vltsaved";	///< Value of last bytes of each file