diff -rub boost_1_53_0.org/libs/random/src/random_device.cpp boost_1_53_0/libs/random/src/random_device.cpp
--- boost_1_53_0.org/libs/random/src/random_device.cpp	Tue Apr  5 21:27:52 2011
+++ boost_1_53_0/libs/random/src/random_device.cpp	Wed Apr 10 12:33:51 2013
@@ -104,18 +110,22 @@
 private:
   void error(const std::string & msg) {
     char buf[80];
+    DWORD error_code (GetLastError());
     DWORD num = FormatMessageA(
       FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
       NULL,
-      GetLastError(),
+      error_code,
       0,
       buf,
       sizeof(buf),
       NULL);
+    char hex_error[9];
+    hex_error[8] = 0;
+    _snprintf (hex_error, sizeof (hex_error), "%08x", error_code);
 
     throw std::invalid_argument("boost::random_device: " + msg + 
-                                " Cryptopraphic Service Provider " + provider + 
-                                ": " + std::string(&buf[0], &buf[0] + num));
+                                ": " + hex_error + " " + std::string(&buf[0], &buf[0] + num) + 
+                                " (Cryptographic Service Provider: " + provider + ")");
   }
   const std::string provider;
   HCRYPTPROV hProv;