diff --git a/.gitmodules b/.gitmodules
index 1d561df2232537bff2af67f7d93ba038b73c0d84..aafb758e7b719d8d1660eb7c7d2e7bf837c92f63 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -49,3 +49,6 @@
 [submodule "fmc/adc-lib"]
 	path = fmc/adc-lib
 	url = git://ohwr.org/misc/adc-lib.git
+[submodule "bst"]
+	path = bst
+	url = ./bst
diff --git a/bst b/bst
new file mode 160000
index 0000000000000000000000000000000000000000..bf2ca0181a27cc8cdf637fd572b5c1c8cd856efd
--- /dev/null
+++ b/bst
@@ -0,0 +1 @@
+Subproject commit bf2ca0181a27cc8cdf637fd572b5c1c8cd856efd