diff --git a/arch/arm/src/stm32f7/stm32f74xx75xx_rcc.c b/arch/arm/src/stm32f7/stm32f74xx75xx_rcc.c
index 615e2d455f..0883a31b70 100644
--- a/arch/arm/src/stm32f7/stm32f74xx75xx_rcc.c
+++ b/arch/arm/src/stm32f7/stm32f74xx75xx_rcc.c
@@ -585,11 +585,17 @@ static inline void rcc_enableapb2(void)
 #endif
 
 #ifdef CONFIG_STM32F7_SDMMC1
-  /* SDIO clock enable */
+  /* SDIO_1 clock enable */
 
   regval |= RCC_APB2ENR_SDMMC1EN;
 #endif
 
+#ifdef CONFIG_STM32F7_SDMMC2
+  /* SDIO_2 clock enable */
+
+  regval |= RCC_APB2ENR_SDMMC2EN;
+#endif
+
 #ifdef CONFIG_STM32F7_SPI1
   /* SPI1 clock enable */
 
diff --git a/arch/arm/src/stm32f7/stm32f76xx77xx_rcc.c b/arch/arm/src/stm32f7/stm32f76xx77xx_rcc.c
index abc6fc2964..aa31490f16 100644
--- a/arch/arm/src/stm32f7/stm32f76xx77xx_rcc.c
+++ b/arch/arm/src/stm32f7/stm32f76xx77xx_rcc.c
@@ -590,11 +590,17 @@ static inline void rcc_enableapb2(void)
 #endif
 
 #ifdef CONFIG_STM32F7_SDMMC1
-  /* SDIO clock enable */
+  /* SDIO_1 clock enable */
 
   regval |= RCC_APB2ENR_SDMMC1EN;
 #endif
 
+#ifdef CONFIG_STM32F7_SDMMC2
+  /* SDIO_2 clock enable */
+
+  regval |= RCC_APB2ENR_SDMMC2EN;
+#endif
+
 #ifdef CONFIG_STM32F7_SPI1
   /* SPI1 clock enable */