diff --git a/drivers/mtd/sst26.c b/drivers/mtd/sst26.c
index 51888da063b..27648ae91a2 100644
--- a/drivers/mtd/sst26.c
+++ b/drivers/mtd/sst26.c
@@ -245,6 +245,7 @@ static inline void sst26_unlock(FAR struct spi_dev_s *dev);
 static inline int sst26_readid(struct sst26_dev_s *priv);
 static void sst26_waitwritecomplete(struct sst26_dev_s *priv);
 static void sst26_writeenable(struct sst26_dev_s *priv);
+static void sst26_writedisable(struct sst26_dev_s *priv);
 static void sst26_globalunlock(struct sst26_dev_s *priv);
 static inline void sst26_sectorerase(struct sst26_dev_s *priv, off_t offset, uint8_t type);
 static inline int  sst26_chiperase(struct sst26_dev_s *priv);
@@ -427,7 +428,7 @@ static void sst26_globalunlock(struct sst26_dev_s *priv)
 
   SPI_SELECT(priv->dev, SPIDEV_FLASH, true);
 
-  /* Send "Write Enable (WREN)" command */
+  /* Send "Global Unlock (ULBPR)" command */
 
   (void)SPI_SEND(priv->dev, SST26_ULBPR);
 
@@ -459,6 +460,27 @@ static void sst26_writeenable(struct sst26_dev_s *priv)
   sstinfo("Enabled\n");
 }
 
+/************************************************************************************
+ * Name:  sst26_writedisable
+ ************************************************************************************/
+
+static void sst26_writedisable(struct sst26_dev_s *priv)
+{
+  /* Select this FLASH part */
+
+  SPI_SELECT(priv->dev, SPIDEV_FLASH, true);
+
+  /* Send "Write Disable (WRDI)" command */
+
+  (void)SPI_SEND(priv->dev, SST26_WRDI);
+
+  /* Deselect the FLASH */
+
+  SPI_SELECT(priv->dev, SPIDEV_FLASH, false);
+
+  sstinfo("Disabled\n");
+}
+
 /************************************************************************************
  * Name:  sst26_sectorerase (4k)
  ************************************************************************************/
@@ -939,8 +961,9 @@ FAR struct mtd_dev_s *sst26_initialize_spi(FAR struct spi_dev_s *dev)
       else
         {
           /* Make sure that the FLASH is unprotected so that we can write into it */
-
+          sst26_writeenable(priv);
           sst26_globalunlock(priv);
+          sst26_writedisable(priv);
 
 #ifdef CONFIG_MTD_REGISTRATION
           /* Register the MTD with the procfs system if enabled */