diff --git a/src/runtime/src/main.rs b/src/runtime/src/main.rs
index 4f6433e..3fada3e 100644
--- a/src/runtime/src/main.rs
+++ b/src/runtime/src/main.rs
@@ -145,6 +145,7 @@ pub fn main_core0() {
     i2c::init();
     let i2c_bus = unsafe { (i2c::I2C_BUS).as_mut().unwrap() };
 
+    #[cfg(feature = "target_kasli_soc")]
     let (mut io_expander0, mut io_expander1);
     #[cfg(feature = "target_kasli_soc")]
     {
diff --git a/src/satman/src/main.rs b/src/satman/src/main.rs
index db82244..88b394a 100644
--- a/src/satman/src/main.rs
+++ b/src/satman/src/main.rs
@@ -612,6 +612,7 @@ pub extern "C" fn main_core0() -> i32 {
     let mut i2c = I2c::i2c0();
     i2c.init().expect("I2C initialization failed");
 
+    #[cfg(feature = "target_kasli_soc")]
     let (mut io_expander0, mut io_expander1);
     #[cfg(feature = "target_kasli_soc")]
     {