diff --git a/third_party/houdini/CMakeLists.txt b/third_party/houdini/CMakeLists.txt
index b3447c37..3b2c0c78 100644
--- a/third_party/houdini/CMakeLists.txt
+++ b/third_party/houdini/CMakeLists.txt
@@ -13,9 +13,17 @@ add_definitions(
     -DVERSION="${HOUDINI_VERSION}"
     -DHOUDINI_DOT_VERSION=${HOUDINI_BUILD_VERSION} )
 
-add_definitions(  -fpermissive -D_GNU_SOURCE -DLINUX -DAMD64 -DSIZEOF_VOID_P=8 -DFBX_ENABLED=1 -DOPENCL_ENABLED=1 -DOPENVDB_ENABLED=1 
--DMAKING_DSO -DSESI_LITTLE_ENDIAN -DENABLE_THREADS -DUSE_PTHREADS -D_REENTRANT -D_FILE_OFFSET_BITS=64 -DGCC4 -DGCC3 
--Wall -Wno-parentheses -Wno-sign-compare -Wno-reorder -Wno-uninitialized -Wunused -Wno-unused-parameter -Wno-unused-local-typedefs -Wno-empty-body -fno-strict-aliasing )
+# generic OS independend definitions
+add_definitions( -DAMD64 -DSIZEOF_VOID_P=8 -fpermissive -DFBX_ENABLED=1 -DOPENCL_ENABLED=1 -DOPENVDB_ENABLED=1 -DSESI_LITTLE_ENDIAN -fno-strict-aliasing)
+
+
+if (WIN32)
+    add_definitions(-DI386 -DWIN32 -DSWAP_BITFIELDS -D_WIN32_WINNT=0x0502 -DNOMINMAX -DSTRICT -DWIN32_LEAN_AND_MEAN -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_DEPRECATE -D_CRT_NONSTDC_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS -DSESI_LITTLE_ENDIAN -DHBOOST_ALL_NO_LIB -DEIGEN_MALLOC_ALREADY_ALIGNED=0)
+else ()
+    # linux / osx specific definitions ?
+    add_definitions(-Wall -Wno-parentheses -Wno-sign-compare -Wno-reorder -Wno-uninitialized -Wunused -Wno-unused-parameter -Wno-unused-local-typedefs -Wno-empty-body)
+    add_definitions(-D_GNU_SOURCE -DLINUX  -DMAKING_DSO -DENABLE_THREADS -DUSE_PTHREADS -D_REENTRANT -D_FILE_OFFSET_BITS=64 -DGCC4 -DGCC3 )
+endif ()
 
 add_subdirectory(lib)
 add_subdirectory(plugin)