diff --git a/configs/qemu-riscv64_smode_defconfig b/configs/qemu-riscv64_smode_defconfig
index 42ec49eb..e9b025a2 100644
--- a/configs/qemu-riscv64_smode_defconfig
+++ b/configs/qemu-riscv64_smode_defconfig
@@ -17,3 +17,4 @@ CONFIG_USE_BOOTARGS=y
 CONFIG_BOOTARGS="console=ttyS0 earlycon"
 CONFIG_USE_PREBOOT=y
 CONFIG_PREBOOT="cp.l ${fdtcontroladdr} ${fdt_addr_r} 0x10000;"
+CONFIG_NR_CPUS=32
diff --git a/configs/sifive_fu540_defconfig b/configs/sifive_fu540_defconfig
index dff48057..cf506dcf 100644
--- a/configs/sifive_fu540_defconfig
+++ b/configs/sifive_fu540_defconfig
@@ -13,3 +13,4 @@ CONFIG_OF_PRIOR_STAGE=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_USE_BOOTARGS=y
 CONFIG_BOOTARGS="console=ttySIF0 earlycon"
+CONFIG_NR_CPUS=32