diff --git a/subtree/rabit/include/dmlc/io.h b/subtree/rabit/include/dmlc/io.h
index 1b7d70498..8caf2a1f7 100644
--- a/subtree/rabit/include/dmlc/io.h
+++ b/subtree/rabit/include/dmlc/io.h
@@ -303,7 +303,7 @@ inline void Stream::Write(const std::vector<T> &vec) {
   uint64_t sz = static_cast<uint64_t>(vec.size());
   this->Write(&sz, sizeof(sz));
   if (sz != 0) {
-    this->Write(&vec[0], sizeof(T) * sz);
+    this->Write(&vec[0], sizeof(T) * vec.size());
   }
 }
 template<typename T>
@@ -320,7 +320,7 @@ inline void Stream::Write(const std::string &str) {
   uint64_t sz = static_cast<uint64_t>(str.length());
   this->Write(&sz, sizeof(sz));
   if (sz != 0) {
-    this->Write(&str[0], sizeof(char) * sz);
+    this->Write(&str[0], sizeof(char) * str.length());
   }
 }
 inline bool Stream::Read(std::string *out_str) {
diff --git a/subtree/rabit/windows/rabit/rabit.vcxproj b/subtree/rabit/windows/rabit/rabit.vcxproj
index 36ac12658..12cb43e07 100644
--- a/subtree/rabit/windows/rabit/rabit.vcxproj
+++ b/subtree/rabit/windows/rabit/rabit.vcxproj
@@ -34,7 +34,7 @@
     <CharacterSet>MultiByte</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>MultiByte</CharacterSet>
@@ -86,6 +86,7 @@
       <Optimization>MaxSpeed</Optimization>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
     </ClCompile>
     <Link>
       <GenerateDebugInformation>true</GenerateDebugInformation>