diff --git a/ports/stm32/boards/stm32f091_af.csv b/ports/stm32/boards/stm32f091_af.csv
index 5e44697776..b8fba765e1 100644
--- a/ports/stm32/boards/stm32f091_af.csv
+++ b/ports/stm32/boards/stm32f091_af.csv
@@ -1,6 +1,6 @@
 Port ,Pin ,AF0               ,AF1                 ,AF2                 ,AF3       ,AF4                 ,AF5             ,AF6     ,AF7      ,,,,,,,,,ADC
      ,    ,AF0               ,AF1                 ,AF2                 ,AF3       ,AF4                 ,AF5             ,AF6     ,AF7      ,,,,,,,,,ADC
-PortA,PA0 ,                  ,USART2_CTS          ,TIM2_CH1_ETR        ,TSC_G1_IO1,USART4_TX           ,                ,        ,COMP1_OUT,,,,,,,,,ADC1_IN0
+PortA,PA0 ,                  ,USART2_CTS          ,TIM2_CH1/TIM2_ETR   ,TSC_G1_IO1,USART4_TX           ,                ,        ,COMP1_OUT,,,,,,,,,ADC1_IN0
 PortA,PA1 ,EVENTOUT          ,USART2_RTS          ,TIM2_CH2            ,TSC_G1_IO2,USART4_RX           ,TIM15_CH1N      ,        ,         ,,,,,,,,,ADC1_IN1
 PortA,PA2 ,TIM15_CH1         ,USART2_TX           ,TIM2_CH3            ,TSC_G1_IO3,                    ,                ,        ,COMP2_OUT,,,,,,,,,ADC1_IN2
 PortA,PA3 ,TIM15_CH2         ,USART2_RX           ,TIM2_CH4            ,TSC_G1_IO4,                    ,                ,        ,         ,,,,,,,,,ADC1_IN3