diff --git a/lib/glthread/cond.h b/lib/glthread/cond.h
index f71e627..a9fc699 100644
--- a/lib/glthread/cond.h
+++ b/lib/glthread/cond.h
@@ -269,7 +269,7 @@ typedef pthread_cond_t gl_cond_t;
 
 /* ========================================================================= */
 
-#if !(USE_POSIX_THREADS || USE_PTH_THREADS || USE_SOLARIS_THREADS || USE_WIN32_THREADS)
+#if !(USE_POSIX_THREADS || USE_PTH_THREADS || USE_SOLARIS_THREADS)
 
 /* Provide dummy implementation if threads are not supported.  */
 
@@ -285,6 +285,10 @@ typedef int gl_cond_t;
 
 #endif
 
+#if USE_WIN32_THREADS 
+# define ETIMEDOUT WSAETIMEDOUT
+#endif
+
 /* ========================================================================= */
 
 /* Macros with built-in error handling.  */