diff --git a/src/MeoAssistant/AsstUtils.hpp b/src/MeoAssistant/AsstUtils.hpp
index 671dae118a..458705d081 100644
--- a/src/MeoAssistant/AsstUtils.hpp
+++ b/src/MeoAssistant/AsstUtils.hpp
@@ -251,7 +251,7 @@ namespace asst
                         pipe_str.append(pipe_buffer.get(), pipe_buffer.get() + read_num);
                         read_num = read(pipe_out[PIPE_READ], pipe_buffer.get(), PipeBuffSize);
                     };
-                } while (::waitpid(child, nullptr, WNOHANG) == 0);
+                } while (::waitpid(child, &exit_ret, WNOHANG) == 0);
 
                 close(pipe_in[PIPE_WRITE]);
                 close(pipe_out[PIPE_READ]);
diff --git a/src/MeoAssistant/Controller.cpp b/src/MeoAssistant/Controller.cpp
index ee92cc97e2..6ee6447b9f 100644
--- a/src/MeoAssistant/Controller.cpp
+++ b/src/MeoAssistant/Controller.cpp
@@ -459,7 +459,7 @@ std::optional<std::vector<unsigned char>> asst::Controller::call_command(const s
                 pipe_data.insert(pipe_data.end(), m_pipe_buffer.get(), m_pipe_buffer.get() + read_num);
                 read_num = read(m_pipe_out[PIPE_READ], m_pipe_buffer.get(), PipeBuffSize);
             };
-        } while (::waitpid(m_child, nullptr, WNOHANG) == 0);
+        } while (::waitpid(m_child, &exit_ret, WNOHANG) == 0);
     }
     else {
         // failed to create child process