diff --git a/src/modules/filesystem/physfs/Filesystem.cpp b/src/modules/filesystem/physfs/Filesystem.cpp
index 7e81f244e..7c47ad1d5 100644
--- a/src/modules/filesystem/physfs/Filesystem.cpp
+++ b/src/modules/filesystem/physfs/Filesystem.cpp
@@ -39,6 +39,7 @@
 #	include <direct.h>
 #	include <initguid.h>
 #	include <Shlobj.h>
+#	include <Knownfolders.h>
 #else
 #	include <sys/param.h>
 #	include <unistd.h>