diff --git a/stmhal/.gitignore b/stmhal/.gitignore
new file mode 100644
index 0000000000..61ad25738f
--- /dev/null
+++ b/stmhal/.gitignore
@@ -0,0 +1,5 @@
+build-PYBV3/
+build-PYBV4/
+build-PYBV10/
+build-STM32F4DISC/
+build-NETDUINO_PLUS_2/