diff --git a/include/dt-bindings/mfd/stm32f7-rcc.h b/include/dt-bindings/mfd/stm32f7-rcc.h
index 8b7b7197ffd7..a90f3613c584 100644
--- a/include/dt-bindings/mfd/stm32f7-rcc.h
+++ b/include/dt-bindings/mfd/stm32f7-rcc.h
@@ -91,6 +91,7 @@
 #define STM32F7_RCC_APB2_TIM8		1
 #define STM32F7_RCC_APB2_USART1		4
 #define STM32F7_RCC_APB2_USART6		5
+#define STM32F7_RCC_APB2_SDMMC2		7
 #define STM32F7_RCC_APB2_ADC1		8
 #define STM32F7_RCC_APB2_ADC2		9
 #define STM32F7_RCC_APB2_ADC3		10