diff --git a/CHANGELOG.md b/CHANGELOG.md
index 699f4df4a4b..c7fe6726913 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -28,6 +28,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Loosened the lower bound on the `num-complex` optional dependency to support
   interop with `rust-numpy` and `ndarray` when building with the MSRV of 1.41
   [#1799](https://github.com/PyO3/pyo3/pull/1799)
+- Add missing `Py_DECREF` to `Python::run_code` which fixes a memory leak when
+  calling Python from Rust. [#1806](https://github.com/PyO3/pyo3/pull/1806)
 
 ## [0.14.2] - 2021-08-09
 
diff --git a/src/python.rs b/src/python.rs
index 176474156ec..3ded9283c98 100644
--- a/src/python.rs
+++ b/src/python.rs
@@ -396,6 +396,7 @@ impl<'p> Python<'p> {
                 return Err(PyErr::api_call_failed(self));
             }
             let res_ptr = ffi::PyEval_EvalCode(code_obj, globals, locals);
+            ffi::Py_DECREF(code_obj);
 
             self.from_owned_ptr_or_err(res_ptr)
         }