diff --git a/cpp-subprocess/subprocess.hpp b/cpp-subprocess/subprocess.hpp
index 5ff76fa..5943d7a 100644
--- a/cpp-subprocess/subprocess.hpp
+++ b/cpp-subprocess/subprocess.hpp
@@ -1820,7 +1820,7 @@ inline void Popen::execute_process() noexcept(false)
         // Throw whatever information we have about child failure
         throw CalledProcessError(err_buf, retcode);
       }
-    } catch (std::exception& exp) {
+    } catch (std::exception&) {
       stream_.cleanup_fds();
       throw;
     }