diff --git a/compiler/rustc_target/src/spec/riscv32i_unknown_none_elf.rs b/compiler/rustc_target/src/spec/riscv32i_unknown_none_elf.rs
index a31a08a8cf93d..a7372a390b22c 100644
--- a/compiler/rustc_target/src/spec/riscv32i_unknown_none_elf.rs
+++ b/compiler/rustc_target/src/spec/riscv32i_unknown_none_elf.rs
@@ -12,7 +12,7 @@ pub fn target() -> Target {
             linker_flavor: LinkerFlavor::Lld(LldFlavor::Ld),
             linker: Some("rust-lld".to_string()),
             cpu: "generic-rv32".to_string(),
-            max_atomic_width: Some(0),
+            max_atomic_width: Some(32),
             atomic_cas: false,
             features: String::new(),
             executables: true,
diff --git a/compiler/rustc_target/src/spec/riscv32imc_unknown_none_elf.rs b/compiler/rustc_target/src/spec/riscv32imc_unknown_none_elf.rs
index 89d760e082f19..c8745893b88f5 100644
--- a/compiler/rustc_target/src/spec/riscv32imc_unknown_none_elf.rs
+++ b/compiler/rustc_target/src/spec/riscv32imc_unknown_none_elf.rs
@@ -12,7 +12,7 @@ pub fn target() -> Target {
             linker_flavor: LinkerFlavor::Lld(LldFlavor::Ld),
             linker: Some("rust-lld".to_string()),
             cpu: "generic-rv32".to_string(),
-            max_atomic_width: Some(0),
+            max_atomic_width: Some(32),
             atomic_cas: false,
             features: "+m,+c".to_string(),
             executables: true,