1 files changed, 1 insertions, 0 deletions
diff --git a/lib/windows-mutex.h b/lib/windows-mutex.h
index 88de4bdc..cb676c1b 100644
--- a/lib/windows-mutex.h
+++ b/lib/windows-mutex.h
@@ -28,6 +28,7 @@
 typedef struct
         {
           glwthread_initguard_t guard; /* protects the initialization */
+          DWORD owner;
           CRITICAL_SECTION lock;
         }
         glwthread_mutex_t;