diff --git a/configs/firefly-rk3399_defconfig b/configs/firefly-rk3399_defconfig
index 2858c35..3803e42 100644
--- a/configs/firefly-rk3399_defconfig
+++ b/configs/firefly-rk3399_defconfig
@@ -1,5 +1,6 @@
 CONFIG_ARM=y
 CONFIG_SKIP_LOWLEVEL_INIT=y
+CONFIG_COUNTER_FREQUENCY=24000000
 CONFIG_ARCH_ROCKCHIP=y
 CONFIG_SYS_TEXT_BASE=0x00200000
 CONFIG_NR_DRAM_BANKS=1