diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2c464cbda..ef8b6ade3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -99,6 +99,7 @@ find_package(SimGear 2.0.0 REQUIRED)
 
 check_include_file(unistd.h HAVE_UNISTD_H)
 check_include_file(sys/time.h HAVE_SYS_TIME_H)
+check_include_file(windows.h HAVE_WINDOWS_H)
 
 # definition depends on OSG version
 set(CMAKE_REQUIRED_INCLUDES ${OPENSCENEGRAPH_INCLUDE_DIRS})
@@ -152,7 +153,7 @@ if(WIN32)
         #     SET(WARNING_FLAGS "${WARNING_FLAGS} /wd${warning}")
         # endforeach(warning)
         
-        set(MSVC_FLAGS "-DNOMINMAX -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D__CRT_NONSTDC_NO_WARNINGS")
+        set(MSVC_FLAGS "-DNOMINMAX -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_SCL_SECURE_NO_WARNINGS -D__CRT_NONSTDC_NO_WARNINGS")
     endif(MSVC)
 
     set(NOMINMAX 1)
diff --git a/src/Include/config_cmake.h.in b/src/Include/config_cmake.h.in
index de02ad902..4505aa2dc 100644
--- a/src/Include/config_cmake.h.in
+++ b/src/Include/config_cmake.h.in
@@ -17,6 +17,7 @@
 #define ENABLE_AUDIO_SUPPORT 1 
 
 #cmakedefine HAVE_SYS_TIME_H
+#cmakedefine HAVE_WINDOWS_H
 #cmakedefine HAVE_CULLSETTINGS_CLEAR_MASK
 
 #define VERSION "@FLIGHTGEAR_VERSION@"