diff --git a/examples/osghangglide/hat.cpp b/examples/osghangglide/hat.cpp
index 3f4f49e3e..1f6587bf9 100644
--- a/examples/osghangglide/hat.cpp
+++ b/examples/osghangglide/hat.cpp
@@ -17,7 +17,7 @@
 */
 
 #ifdef _MSC_VER
-#include <Windows.h>
+#include <windows.h>
 #pragma warning( disable : 4244 )
 #endif
 
diff --git a/src/osgPlugins/ZeroConfDevice/CMakeLists.txt b/src/osgPlugins/ZeroConfDevice/CMakeLists.txt
index 03e9e8787..1fdcabfab 100644
--- a/src/osgPlugins/ZeroConfDevice/CMakeLists.txt
+++ b/src/osgPlugins/ZeroConfDevice/CMakeLists.txt
@@ -19,7 +19,7 @@ IF(WIN32)
         mdns_win/dns_sd.h
         mdns_win/dns-sd.c
     )
-    SET(TARGET_EXTERNAL_LIBRARIES "${TARGET_EXTERNAL_LIBRARIES};Ws2_32.lib;winmm")
+    SET(TARGET_EXTERNAL_LIBRARIES "${TARGET_EXTERNAL_LIBRARIES};ws2_32.lib;winmm")
     SET(TARGET_LIBRARIES_VARS ZEROCONF_LIBRARY)
     ADD_DEFINITIONS(-DNOT_HAVE_GETOPT)
     ADD_DEFINITIONS(-DNOT_HAVE_SETLINEBUF)
diff --git a/src/osgPlugins/ply/typedefs.h b/src/osgPlugins/ply/typedefs.h
index 4d6c833d1..7a1e33436 100644
--- a/src/osgPlugins/ply/typedefs.h
+++ b/src/osgPlugins/ply/typedefs.h
@@ -13,8 +13,8 @@
 #define MESH_TYPEDEFS_H
 
 #   if defined(_MSC_VER)
-#      include <Winsock2.h>
-#      include <Windows.h>
+#      include <winsock2.h>
+#      include <windows.h>
 #   endif
 
 #   include <osg/Notify>
diff --git a/src/osgPlugins/vrml/CMakeLists.txt b/src/osgPlugins/vrml/CMakeLists.txt
index cacff5a31..194bb9a19 100644
--- a/src/osgPlugins/vrml/CMakeLists.txt
+++ b/src/osgPlugins/vrml/CMakeLists.txt
@@ -27,7 +27,7 @@ IF (WIN32)
         PNG_LIBRARY
         ZLIB_LIBRARIES)
     SET(TARGET_EXTERNAL_LIBRARIES
-        Ws2_32.lib)
+        ws2_32.lib)
 ELSE()
     SET(TARGET_LIBRARIES_VARS
         OPENVRML_LIBRARY)