diff --git a/examples/cpp/core/multiprecision/multiprecision.cpp b/examples/cpp/core/multiprecision/multiprecision.cpp
index a911c193..ed03b932 100644
--- a/examples/cpp/core/multiprecision/multiprecision.cpp
+++ b/examples/cpp/core/multiprecision/multiprecision.cpp
@@ -4,6 +4,7 @@
 #include <bond/stream/output_buffer.h>
 
 #include <boost/multiprecision/miller_rabin.hpp>
+#include <boost/random.hpp>
 
 using namespace examples::multiprecision;
 
diff --git a/examples/cpp/core/multiprecision/multiprecision.h b/examples/cpp/core/multiprecision/multiprecision.h
index 133e1f00..cc5967af 100644
--- a/examples/cpp/core/multiprecision/multiprecision.h
+++ b/examples/cpp/core/multiprecision/multiprecision.h
@@ -75,7 +75,7 @@ namespace bond
             // Bond expects that blob with default value is empty
             return 0;
         else
-            return num.backend().size() * sizeof(limb_type);
+            return static_cast<uint32_t>(num.backend().size() * sizeof(limb_type));
     }