diff --git a/target/linux/siflower/sf21/config-6.12 b/target/linux/siflower/sf21/config-6.12
index ab32a0474d..e92d565d4a 100644
--- a/target/linux/siflower/sf21/config-6.12
+++ b/target/linux/siflower/sf21/config-6.12
@@ -258,7 +258,6 @@ CONFIG_RISCV_TIMER=y
 CONFIG_RISCV_USE_LINKER_RELAXATION=y
 CONFIG_RPS=y
 # CONFIG_RUNTIME_KERNEL_TESTING_MENU is not set
-CONFIG_RUSTC_HAS_UNNECESSARY_TRANSMUTES=y
 CONFIG_RWSEM_SPIN_ON_OWNER=y
 # CONFIG_SERIAL_8250 is not set
 CONFIG_SERIAL_AMBA_PL011=y