diff --git a/libraries/AP_HAL_ChibiOS/hwdef/common/bouncebuffer.c b/libraries/AP_HAL_ChibiOS/hwdef/common/bouncebuffer.c
index a5536a3976..840d1bd612 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/common/bouncebuffer.c
+++ b/libraries/AP_HAL_ChibiOS/hwdef/common/bouncebuffer.c
@@ -25,7 +25,7 @@
 // always use a bouncebuffer on H7, to ensure alignment and padding
 #define IS_DMA_SAFE(addr) false
 #elif defined(STM32F732xx)
-// DTCM DMA does not work on F732
+// always use bounce buffer on F732
 #define IS_DMA_SAFE(addr) false
 #elif defined(STM32F7)
 // on F76x we only consider first half of DTCM memory as DMA safe, 2nd half is used as fast memory for EKF