diff --git a/.gitmodules b/.gitmodules
index b17471a..8bc2054 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -19,3 +19,6 @@
 [submodule "tcp_socket"]
 	path = tcp_socket
 	url = https://git.mount-mockery.de/pylib/tcp_socket
+[submodule "fstools"]
+	path = fstools
+	url = https://git.mount-mockery.de/pylib/fstools
diff --git a/Makefile b/Makefile
index 3b07528..4b25a62 100644
--- a/Makefile
+++ b/Makefile
@@ -8,6 +8,7 @@ SOURCEDIR     = .
 BUILDDIR      = _build
 MODULES       = $(sort \
     caching\
+    fstools\
     socket_protocol\
     state_machine\
     stringtools\
diff --git a/fstools b/fstools
new file mode 160000
index 0000000..262141f
--- /dev/null
+++ b/fstools
@@ -0,0 +1 @@
+Subproject commit 262141f2956757b0c8cbce8724728fa1d0630297