diff --git a/examples/stm32f1/Cargo.toml b/examples/stm32f1/Cargo.toml
index 84773b91b..765e91b5d 100644
--- a/examples/stm32f1/Cargo.toml
+++ b/examples/stm32f1/Cargo.toml
@@ -20,3 +20,6 @@ panic-probe = { version = "0.3", features = ["print-defmt"] }
 futures = { version = "0.3.17", default-features = false, features = ["async-await"] }
 heapless = { version = "0.7.5", default-features = false }
 nb = "1.0.0"
+
+[profile.dev]
+opt-level = "s"