diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7f4230fb..20e2131e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -104,7 +104,7 @@ if(WIN32)
     set(CMAKE_MFC_FLAG 0)
 #     add_definitions(-DNGINTERFACE_EXPORTS)
 #     add_definitions(-DNGLIB_EXPORTS)
-    add_definitions(-DMSVC_EXPRESS -D_CRT_SECURE_NO_WARNINGS) 
+    add_definitions(-DMSVC_EXPRESS -D_CRT_SECURE_NO_WARNINGS -DHAVE_STRUCT_TIMESPEC)
     # build convenience (aka object) libraries in windows)
     set(NG_LIB_TYPE OBJECT)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP /wd4244 /wd4800")
@@ -162,6 +162,7 @@ endif (USE_GUI)
 if (USE_PYTHON)
     set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH}" "${PROJECT_SOURCE_DIR}/cmake_modules/python")
     set(PYTHON_VERSION "3" CACHE STRING "")
+    set(Python_ADDITIONAL_VERSIONS 3.5)
     if( PYTHON_VERSION VERSION_LESS 3 )
         message(FATAL_ERROR "NGSolve supports only Python 3")
     endif( PYTHON_VERSION VERSION_LESS 3 )
diff --git a/ng/CMakeLists.txt b/ng/CMakeLists.txt
index 338d3589..d35b1648 100644
--- a/ng/CMakeLists.txt
+++ b/ng/CMakeLists.txt
@@ -44,7 +44,7 @@ if(USE_GUI)
 endif(USE_GUI)
 
 if(USE_PYTHON)
-    add_library(pynglib MODULE netgenpy.cpp)
+    add_library(pynglib SHARED netgenpy.cpp)
     target_link_libraries( pynglib nglib )
     if(APPLE)
         set_target_properties( pynglib PROPERTIES SUFFIX ".so")