diff --git a/os/hal/platforms/STM32/sdc_lld.h b/os/hal/platforms/STM32/sdc_lld.h
index 292688e40..a2cb6472d 100644
--- a/os/hal/platforms/STM32/sdc_lld.h
+++ b/os/hal/platforms/STM32/sdc_lld.h
@@ -145,6 +145,10 @@
  * @brief   SDIO data timeouts in SDIO clock cycles.
  */
 #if (defined(STM32F4XX) || defined(STM32F2XX))
+#if !STM32_CLOCK48_REQUIRED
+#error "SDIO requires STM32_CLOCK48_REQUIRED to be enabled"
+#endif
+
 #define STM32_SDC_WRITE_TIMEOUT                                             \
   (((STM32_PLL48CLK / (STM32_SDIO_DIV_HS + 2)) / 1000) * SDC_WRITE_TIMEOUT_MS)
 #define STM32_SDC_READ_TIMEOUT                                              \
diff --git a/os/hal/platforms/STM32F2xx/hal_lld.h b/os/hal/platforms/STM32F2xx/hal_lld.h
index 09a1be836..e704b7fa2 100644
--- a/os/hal/platforms/STM32F2xx/hal_lld.h
+++ b/os/hal/platforms/STM32F2xx/hal_lld.h
@@ -596,7 +596,7 @@
 #endif
 
 /**
- * @brief   USB clock setting.
+ * @brief   USB/SDIO clock setting.
  */
 #if !defined(STM32_CLOCK48_REQUIRED) || defined(__DOXYGEN__)
 #define STM32_CLOCK48_REQUIRED      TRUE
diff --git a/os/hal/platforms/STM32F4xx/hal_lld.h b/os/hal/platforms/STM32F4xx/hal_lld.h
index d7485ade1..6cde89012 100644
--- a/os/hal/platforms/STM32F4xx/hal_lld.h
+++ b/os/hal/platforms/STM32F4xx/hal_lld.h
@@ -602,7 +602,7 @@
 #endif
 
 /**
- * @brief   USB clock setting.
+ * @brief   USB/SDIO clock setting.
  */
 #if !defined(STM32_CLOCK48_REQUIRED) || defined(__DOXYGEN__)
 #define STM32_CLOCK48_REQUIRED      TRUE