diff --git a/.github/workflows/build-wheels.yml b/.github/workflows/build-wheels.yml
index 9bd548be6..71eca72e0 100644
--- a/.github/workflows/build-wheels.yml
+++ b/.github/workflows/build-wheels.yml
@@ -70,6 +70,7 @@ jobs:
           path: dist/*.tar.gz
 
   upload_pypi:
+    name: Upload to PyPI
     needs: [build_wheels, build_sdist]
     runs-on: ubuntu-latest
     environment: pypi
diff --git a/src/lib/ViZDoomController.cpp b/src/lib/ViZDoomController.cpp
index bb2a09bff..e5f2f0238 100644
--- a/src/lib/ViZDoomController.cpp
+++ b/src/lib/ViZDoomController.cpp
@@ -212,7 +212,7 @@ namespace vizdoom {
 
                 this->MQDoom->send(MSG_CODE_CLOSE);
 
-                #ifdef OS_LINUX
+                #ifdef OS_POSIX
                     if(0 == kill(this->doomProcessPid, 0)){
                         bpr::child doomProcess(this->doomProcessPid);
                         bpr::terminate(doomProcess);
@@ -1415,7 +1415,7 @@ namespace vizdoom {
             this->doomArgs.push_back("+viz_window_hidden");
             this->doomArgs.push_back("1");
 
-            #ifdef OS_LINUX
+            #ifdef OS_POSIX
                 if (this->noXServer){
                     this->doomArgs.push_back("+viz_noxserver");
                     this->doomArgs.push_back("1");
@@ -1464,7 +1464,7 @@ namespace vizdoom {
     void DoomController::launchDoom() {
         try {
             bpr::child doomProcess = bpr::execute(bpri::set_args(this->doomArgs), bpri::inherit_env());
-            #ifdef OS_LINUX
+            #ifdef OS_POSIX
                 this->doomProcessPid = doomProcess.pid;
             #endif
             bpr::wait_for_exit(doomProcess);
diff --git a/src/lib/ViZDoomController.h b/src/lib/ViZDoomController.h
index 367dd9ae0..070e8912e 100644
--- a/src/lib/ViZDoomController.h
+++ b/src/lib/ViZDoomController.h
@@ -83,12 +83,16 @@ namespace vizdoom {
 /* OSes */
 #ifdef __linux__
     #define OS_LINUX
+    #define OS_POSIX
     #include <sys/types.h>
     #include <signal.h>
 #elif _WIN32
     #define OS_WIN
 #elif __APPLE__
     #define OS_OSX
+    #define OS_POSIX
+    #include <sys/types.h>
+    #include <signal.h>
 #endif
 
     class DoomController {
@@ -329,7 +333,7 @@ namespace vizdoom {
 
         b::thread *doomThread;
 
-        #ifdef OS_LINUX
+        #ifdef OS_POSIX
             pid_t doomProcessPid;
         #endif