diff --git a/ggml.c b/ggml.c
index 3b4c093b3..26d0dee82 100644
--- a/ggml.c
+++ b/ggml.c
@@ -19337,7 +19337,7 @@ static bool __thread_affinity(bool * mask) {
         }
     }
 
-    DWORD_PTR m = (DWORD_PTR)mask;
+    DWORD_PTR m = (DWORD_PTR)bitmask;
 
     m = SetThreadAffinityMask(h, m);