diff --git a/.gitignore b/.gitignore
index 6f78e37..0aa410e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@ rp2040/target
 rp2040/Cargo.lock
 teensylc/.cache/clangd/index
 teensylc/.ccls-cache
+teensylc/.pio/build