diff --git a/arch/arm64/configs/rockchip_defconfig b/arch/arm64/configs/rockchip_defconfig
index 138fae8a1486..d6c2dfd34d3e 100644
--- a/arch/arm64/configs/rockchip_defconfig
+++ b/arch/arm64/configs/rockchip_defconfig
@@ -24,6 +24,7 @@ CONFIG_CGROUP_CPUACCT=y
 CONFIG_CGROUP_BPF=y
 CONFIG_NAMESPACES=y
 # CONFIG_PID_NS is not set
+CONFIG_RT_SOFTINT_OPTIMIZATION=y
 # CONFIG_RD_BZIP2 is not set
 # CONFIG_RD_LZMA is not set
 # CONFIG_RD_XZ is not set