diff --git a/src/core/libraries/kernel/threads/pthread.cpp b/src/core/libraries/kernel/threads/pthread.cpp
index 8b6207880..82e8dcd7f 100644
--- a/src/core/libraries/kernel/threads/pthread.cpp
+++ b/src/core/libraries/kernel/threads/pthread.cpp
@@ -286,7 +286,8 @@ int PS4_SYSV_ABI posix_pthread_create_name_np(PthreadT* thread, const PthreadAtt
     pthread_attr_init(&pattr);
     // pthread_attr_setstack(&pattr, new_thread->attr.stackaddr_attr,
     // new_thread->attr.stacksize_attr);
-    int ret = pthread_create(pthr, &pattr, (PthreadEntryFunc)RunThread, new_thread);
+    using WinPthreadEntry = void *(*)(void*);
+    int ret = pthread_create(pthr, &pattr, (WinPthreadEntry)RunThread, new_thread);
     ASSERT_MSG(ret == 0, "Failed to create thread with error {}", ret);
     if (ret) {
         *thread = nullptr;
@@ -343,7 +344,7 @@ int PS4_SYSV_ABI posix_pthread_once(PthreadOnce* once_control, void (*init_routi
         }
     }
 
-    const auto once_cancel_handler = [](void* arg) {
+    const auto once_cancel_handler = [](void* arg) PS4_SYSV_ABI {
         PthreadOnce* once_control = (PthreadOnce*)arg;
         auto state = PthreadOnceState::InProgress;
         if (once_control->state.compare_exchange_strong(state, PthreadOnceState::NeverDone,