diff --git a/configs/r2dplus_defconfig b/configs/r2dplus_defconfig
index 7d06dea..9e2036a 100644
--- a/configs/r2dplus_defconfig
+++ b/configs/r2dplus_defconfig
@@ -4,6 +4,7 @@
 CONFIG_ENV_SIZE=0x40000
 CONFIG_ENV_SECT_SIZE=0x40000
 CONFIG_DEFAULT_DEVICE_TREE="sh7751-r2dplus"
+CONFIG_SYS_CLK_FREQ=60000000
 CONFIG_TARGET_R2DPLUS=y
 CONFIG_SYS_LOAD_ADDR=0x8e000000
 CONFIG_BOOTDELAY=-1