diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index 61391a7..f9c9b19 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -91,6 +91,7 @@
 CONFIG_DM_BOOTCOUNT=y
 CONFIG_DM_BOOTCOUNT_RTC=y
 CONFIG_CLK=y
+CONFIG_SANDBOX_CLK_CCF=y
 CONFIG_CPU=y
 CONFIG_DM_DEMO=y
 CONFIG_DM_DEMO_SIMPLE=y
diff --git a/configs/sandbox_flattree_defconfig b/configs/sandbox_flattree_defconfig
index af33528..2429ae4 100644
--- a/configs/sandbox_flattree_defconfig
+++ b/configs/sandbox_flattree_defconfig
@@ -66,6 +66,7 @@
 CONFIG_ADC=y
 CONFIG_ADC_SANDBOX=y
 CONFIG_CLK=y
+CONFIG_SANDBOX_CLK_CCF=y
 CONFIG_CPU=y
 CONFIG_DM_DEMO=y
 CONFIG_DM_DEMO_SIMPLE=y