diff --git a/crates/core_arch/src/lib.rs b/crates/core_arch/src/lib.rs
index dcd19186a1..a059a9c225 100644
--- a/crates/core_arch/src/lib.rs
+++ b/crates/core_arch/src/lib.rs
@@ -22,7 +22,6 @@
     arm_target_feature,
     mips_target_feature,
     powerpc_target_feature,
-    s390x_target_feature,
     loongarch_target_feature,
     wasm_target_feature,
     abi_unadjusted,
@@ -65,11 +64,7 @@
 )]
 #![cfg_attr(
     test,
-    feature(
-        stdarch_arm_feature_detection,
-        stdarch_powerpc_feature_detection,
-        stdarch_s390x_feature_detection
-    )
+    feature(stdarch_arm_feature_detection, stdarch_powerpc_feature_detection,)
 )]
 
 #[cfg(test)]
diff --git a/rust-version b/rust-version
index e313eada45..04d41c96f5 100644
--- a/rust-version
+++ b/rust-version
@@ -1 +1 @@
-73e6c9ebd9123154a196300ef58e30ec8928e74e
+8401398e1f14a24670ee1a3203713dc2f0f8b3a8