diff --git a/arch/arm/configs/rk3026_tb_defconfig b/arch/arm/configs/rk3026_tb_defconfig
index 3652cf867c3b..97f7741835cd 100644
--- a/arch/arm/configs/rk3026_tb_defconfig
+++ b/arch/arm/configs/rk3026_tb_defconfig
@@ -34,6 +34,7 @@ CONFIG_NO_HZ=y
 CONFIG_HIGH_RES_TIMERS=y
 CONFIG_SMP=y
 # CONFIG_SMP_ON_UP is not set
+CONFIG_NR_CPUS=2
 CONFIG_PREEMPT=y
 CONFIG_AEABI=y
 # CONFIG_OABI_COMPAT is not set
diff --git a/arch/arm/configs/rk3028a_tb_defconfig b/arch/arm/configs/rk3028a_tb_defconfig
index ed7179f740bb..bd6402a31612 100644
--- a/arch/arm/configs/rk3028a_tb_defconfig
+++ b/arch/arm/configs/rk3028a_tb_defconfig
@@ -34,6 +34,7 @@ CONFIG_NO_HZ=y
 CONFIG_HIGH_RES_TIMERS=y
 CONFIG_SMP=y
 # CONFIG_SMP_ON_UP is not set
+CONFIG_NR_CPUS=2
 CONFIG_PREEMPT=y
 CONFIG_AEABI=y
 # CONFIG_OABI_COMPAT is not set