diff --git a/CMakeLists.txt b/CMakeLists.txt
index c15d2ca..dfa2b39 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -32,8 +32,11 @@ ADD_DEFINITIONS(-DSTATIC_BUILD -D_USE_MATH_DEFINES)
 SET (CMAKE_CXX_WARNING_LEVEL 4)
 SET (FLEX "C:/cygwin/bin/flex.exe")
 SET (BISON "C:/cygwin/bin/bison.exe")
-SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /fp:strict")
-SET (CMAKE_C_FLAGS "${CMAKE_CXX_FLAGS} /fp:strict")
+# warning C4251 for dll exports
+# warning C4005 concerning macro redefines in stdint.h
+# warning C4996: 'isatty': The POSIX name for this item is deprecated
+SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /fp:strict /wd4251 /wd4005 /wd4996")
+SET (CMAKE_C_FLAGS "${CMAKE_CXX_FLAGS} /fp:strict /wd4251 /wd4005 /wd4996")
 ELSE (WIN32)
 SET (FLEX flex)
 SET (BISON bison)
diff --git a/src/pycomp/PythonSymdiffCommands.cc b/src/pycomp/PythonSymdiffCommands.cc
index 03efa57..f3b498e 100644
--- a/src/pycomp/PythonSymdiffCommands.cc
+++ b/src/pycomp/PythonSymdiffCommands.cc
@@ -16,6 +16,10 @@ limitations under the License.
 
 /* removes Python_d.lib from any contention */
 //#undef _DEBUG
+#ifdef WIN32
+/* annoying warning on windows for function we don't use */
+#define HAVE_ROUND
+#endif
 #include "Python.h"
 #include "import.h"
 
diff --git a/src/tclcomp/TclSymdiffCommands.cc b/src/tclcomp/TclSymdiffCommands.cc
index 9e008bf..6f4f95f 100644
--- a/src/tclcomp/TclSymdiffCommands.cc
+++ b/src/tclcomp/TclSymdiffCommands.cc
@@ -33,7 +33,7 @@ static Tcl_Obj *returnList(Tcl_Interp *interp, const std::vector<size_t> &index)
   Tcl_Obj *obj = Tcl_NewObj();
   for (size_t i = 0; i < index.size(); ++i)
   {
-    Tcl_ListObjAppendElement(interp, obj, Tcl_NewIntObj(index[i]));
+    Tcl_ListObjAppendElement(interp, obj, Tcl_NewIntObj(static_cast<int>(index[i])));
   }
   return obj;
 }