diff --git a/configs/zynq_z_turn_defconfig b/configs/zynq_z_turn_defconfig
index 9704b81..c896880 100644
--- a/configs/zynq_z_turn_defconfig
+++ b/configs/zynq_z_turn_defconfig
@@ -39,6 +39,7 @@
 CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_ZYNQ=y
 CONFIG_SPI_FLASH=y
+CONFIG_SF_DEFAULT_SPEED=30000000
 CONFIG_SPI_FLASH_SPANSION=y
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_SPI_FLASH_WINBOND=y