diff --git a/addons/imguifilesystem/imguifilesystem.cpp b/addons/imguifilesystem/imguifilesystem.cpp
index bf6395d13724..e1226d3b6320 100644
--- a/addons/imguifilesystem/imguifilesystem.cpp
+++ b/addons/imguifilesystem/imguifilesystem.cpp
@@ -12,6 +12,10 @@
 //    misrepresented as being the original software.
 // 3. This notice may not be removed or altered from any source distribution.
 
+#ifdef _WIN32
+#	include <windows.h>
+#endif //_WIN32
+
 //- Common Code For All Addons needed just to ease inclusion as separate files in user code ----------------------
 #include <imgui.h>
 #undef IMGUI_DEFINE_PLACEMENT_NEW