diff --git a/Source/Threading/Threads/AuOSThread.cpp b/Source/Threading/Threads/AuOSThread.cpp
index 315dde59..edf0f1ee 100644
--- a/Source/Threading/Threads/AuOSThread.cpp
+++ b/Source/Threading/Threads/AuOSThread.cpp
@@ -1032,7 +1032,22 @@ namespace Aurora::Threading::Threads
             }
         }
 
-        SetThreadAffinityMask(this->handle_, mask.lower);
+        if (mask.CpuBitCount() <= 32)
+        {
+            DWORD_PTR uProcMask {};
+            DWORD_PTR uSysMask {};
+            AuUInt32 uProcmask { mask.lower };
+
+            if (::GetProcessAffinityMask(GetCurrentProcess(), &uProcMask, &uSysMask))
+            {
+                uProcmask &= uProcMask;
+            }
+
+            if (::SetThreadAffinityMask(this->handle_, uProcmask))
+            {
+                return;
+            }
+        }
     #endif
 
         SysPushErrorUnavailableError("Couldn't set thread affinity");