diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index 1820eb2..1b2b6c6 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -78,3 +78,5 @@
 {
 	return PROC_I(inode)->fd;
 }
+
+extern struct file_system_type proc_fs_type;