diff --git a/Cargo.toml b/Cargo.toml
index 175b40a13ea..9275c6658b0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,6 +19,7 @@ cfg-if = "1.0"
 libc = "0.2.62"
 parking_lot = ">= 0.11, < 0.13"
 memoffset = "0.9"
+portable-atomic = "1.0"
 
 # ffi bindings to the python interpreter, split into a separate crate so they can be used independently
 pyo3-ffi = { path = "pyo3-ffi", version = "=0.20.2" }
diff --git a/newsfragments/3619.fixed.md b/newsfragments/3619.fixed.md
new file mode 100644
index 00000000000..690542409f4
--- /dev/null
+++ b/newsfragments/3619.fixed.md
@@ -0,0 +1 @@
+Use portable-atomic to support platforms without 64-bit atomics
diff --git a/src/impl_/pymodule.rs b/src/impl_/pymodule.rs
index 8ec963455fc..7c5243fcf1c 100644
--- a/src/impl_/pymodule.rs
+++ b/src/impl_/pymodule.rs
@@ -3,7 +3,7 @@
 use std::cell::UnsafeCell;
 
 #[cfg(all(not(PyPy), Py_3_9, not(all(windows, Py_LIMITED_API, not(Py_3_10)))))]
-use std::sync::atomic::{AtomicI64, Ordering};
+use portable_atomic::{AtomicI64, Ordering};
 
 #[cfg(not(PyPy))]
 use crate::exceptions::PyImportError;