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-rw-r--r--src/librustc_target/spec/riscv32imac_unknown_none_elf.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/librustc_target/spec/riscv32imac_unknown_none_elf.rs b/src/librustc_target/spec/riscv32imac_unknown_none_elf.rs
index 5e24f1f1aa2..8adf562ca7e 100644
--- a/src/librustc_target/spec/riscv32imac_unknown_none_elf.rs
+++ b/src/librustc_target/spec/riscv32imac_unknown_none_elf.rs
@@ -18,7 +18,7 @@ pub fn target() -> TargetResult {
             linker: Some("rust-lld".to_string()),
             cpu: "generic-rv32".to_string(),
             max_atomic_width: Some(32),
-            atomic_cas: false, // incomplete +a extension
+            atomic_cas: true,
             features: "+m,+a,+c".to_string(),
             executables: true,
             panic_strategy: PanicStrategy::Abort,