diff --git a/firmware/integration/rusefi_config.txt b/firmware/integration/rusefi_config.txt
index 12fdd6bcfe..d5067a2d1f 100644
--- a/firmware/integration/rusefi_config.txt
+++ b/firmware/integration/rusefi_config.txt
@@ -124,8 +124,8 @@ custom vvt_mode_e 4 bits,    U32,   @OFFSET@, [0:2], @@vvt_mode_e_enum@@
 custom mass_storage_e 4 bits, U32, @OFFSET@, [0:1], @@mass_storage_e_enum@@
 
 ! At the moment TIM1, TIM2, TIM3 and TIM9 are configured as ICU
-! todo: as of ChibiOS2, only channels 1 & 2 were allowed to capture, need to check ChibiOS3 situation
-! todo: as of ChibiOS2 I think only one channel per timer was allowed to capture, need to check if still the case
+! todo: as of ChibiOS3, only channels 1 & 2 are allowed to capture input, that's a ChibiOS driver limitation
+! todo: only one channel per timer is allowed for capture similtaniously, that's an STM32 limitation
 ! todo: convert slow ADC to software scheduler and make TIM8 available
 ! todo: maybe convert fast ADC to software scheduler as well? less sure about that