diff --git a/bc/system/file/posix/System_File.cpp b/bc/system/file/posix/System_File.cpp
index 88d4275..549f220 100644
--- a/bc/system/file/posix/System_File.cpp
+++ b/bc/system/file/posix/System_File.cpp
@@ -9,6 +9,7 @@
 #include <cerrno>
 #include <unistd.h>
 #include <sys/stat.h>
+#include <fcntl.h>
 
 namespace Blizzard {
 namespace System_File {