diff --git a/os/hal/include/hal_sdc.h b/os/hal/include/hal_sdc.h
index 98a0492ab..6466b1d97 100644
--- a/os/hal/include/hal_sdc.h
+++ b/os/hal/include/hal_sdc.h
@@ -92,6 +92,20 @@
 #if !defined(SDC_NICE_WAITING) || defined(__DOXYGEN__)
 #define SDC_NICE_WAITING                    TRUE
 #endif
+
+/**
+ * @brief   OCR initialization constant for V20 cards.
+ */
+#if !defined(SDC_INIT_OCR_V20) || defined(__DOXYGEN__)
+#define SDC_INIT_OCR_V20                    0x50FF8000U
+#endif
+
+/**
+ * @brief   OCR initialization constant for non-V20 cards.
+ */
+#if !defined(SDC_INIT_OCR) || defined(__DOXYGEN__)
+#define SDC_INIT_OCR                        0x80100000U
+#endif
 /** @} */
 
 /*===========================================================================*/
diff --git a/os/hal/src/hal_sdc.c b/os/hal/src/hal_sdc.c
index 80cbca3bf..70a85b10f 100644
--- a/os/hal/src/hal_sdc.c
+++ b/os/hal/src/hal_sdc.c
@@ -183,10 +183,10 @@ static bool sdc_init(SDCDriver *sdcp) {
   uint32_t resp[1];
 
   if ((sdcp->cardmode &  SDC_MODE_CARDTYPE_MASK) == SDC_MODE_CARDTYPE_SDV20) {
-    ocr = 0xC0100000U;
+    ocr = SDC_INIT_OCR_V20;
   }
   else {
-    ocr = 0x80100000U;
+    ocr = SDC_INIT_OCR;
   }
 
   i = 0;
diff --git a/readme.txt b/readme.txt
index f6c758a81..1624614c8 100644
--- a/readme.txt
+++ b/readme.txt
@@ -157,6 +157,8 @@
 - RT:  Merged RT4.
 - NIL: Merged NIL2.
 - NIL: Added STM32F7 demo.
+- HAL: Fixed invalid SDC OCR initialization value (bug #826)(backported
+       to 16.1.8).
 - HAL: Fixed osThreadSetPriority() returns old priority instead of a status
        code (bug #823)(backported to 16.1.8).
 - HAL: Fixed problem in rtcSTM32SetPeriodicWakeup() (bug #821)(backported