diff --git a/pw_sys_io_baremetal_stm32f429/sys_io_baremetal.cc b/pw_sys_io_baremetal_stm32f429/sys_io_baremetal.cc
index b5b1792..d673ae7 100644
--- a/pw_sys_io_baremetal_stm32f429/sys_io_baremetal.cc
+++ b/pw_sys_io_baremetal_stm32f429/sys_io_baremetal.cc
@@ -87,7 +87,7 @@
 
 // USART configuration flags for config1 register.
 // Note: a large number of configuration flags have been omitted as they default
-// to sane values and we don't need to change them.
+// to reasonable values and we don't need to change them.
 constexpr uint32_t kReceiveEnable = 0x1 << 2;
 constexpr uint32_t kTransmitEnable = 0x1 << 3;
 constexpr uint32_t kReadDataReady = 0x1u << 5;