diff --git a/tokio/src/macros/cfg.rs b/tokio/src/macros/cfg.rs
index 051713f1c..3afc04023 100644
--- a/tokio/src/macros/cfg.rs
+++ b/tokio/src/macros/cfg.rs
@@ -422,7 +422,8 @@ macro_rules! cfg_has_atomic_u64 {
             #[cfg(not(any(
                     target_arch = "arm",
                     target_arch = "mips",
-                    target_arch = "powerpc"
+                    target_arch = "powerpc",
+                    target_arch = "riscv32"
                     )))]
             $item
         )*
@@ -435,7 +436,8 @@ macro_rules! cfg_not_has_atomic_u64 {
             #[cfg(any(
                     target_arch = "arm",
                     target_arch = "mips",
-                    target_arch = "powerpc"
+                    target_arch = "powerpc",
+                    target_arch = "riscv32"
                     ))]
             $item
         )*