diff --git a/minipp/DoubleFileTest.cpp b/minipp/DoubleFileTest.cpp
deleted file mode 100644
index 4839d92..0000000
--- a/minipp/DoubleFileTest.cpp
+++ /dev/null
@@ -1,2 +0,0 @@
-
-#include "minipp/minipp.hpp"
\ No newline at end of file
diff --git a/minipp/minipp.vcxproj b/minipp/minipp.vcxproj
index 8c081ca..d4a63cc 100644
--- a/minipp/minipp.vcxproj
+++ b/minipp/minipp.vcxproj
@@ -130,7 +130,6 @@
     <ClInclude Include="minipp\minipp.hpp" />
   </ItemGroup>
   <ItemGroup>
-    <ClCompile Include="DoubleFileTest.cpp" />
     <ClCompile Include="test.cpp" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
diff --git a/minipp/minipp.vcxproj.filters b/minipp/minipp.vcxproj.filters
index 32c0bd4..dfb7858 100644
--- a/minipp/minipp.vcxproj.filters
+++ b/minipp/minipp.vcxproj.filters
@@ -23,8 +23,5 @@
     <ClCompile Include="test.cpp">
       <Filter>Quelldateien</Filter>
     </ClCompile>
-    <ClCompile Include="DoubleFileTest.cpp">
-      <Filter>Quelldateien</Filter>
-    </ClCompile>
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/minipp/minipp/minipp.hpp b/minipp/minipp/minipp.hpp
index 44a1a39..e047d46 100644
--- a/minipp/minipp/minipp.hpp
+++ b/minipp/minipp/minipp.hpp
@@ -233,6 +233,7 @@ namespace minipp
 #include <typeinfo>
 #include <sstream>
 #include <iomanip>
+#include <stdlib.h>
 #include <bitset>
 
 #if MINIPP_ENABLE_DEBUG_OUTPUT
@@ -957,4 +958,4 @@ bool minipp::MiniPPFile::Tools::IsIntegerDecimal(const std::string& str) noexcep
 }
 
 #pragma endregion
-#endif
\ No newline at end of file
+#endif // MINIPP_IMPLEMENTATION
\ No newline at end of file