diff --git a/winsup/cygwin/thread.cc b/winsup/cygwin/thread.cc
index 6411cdbd6..4b73eb391 100644
--- a/winsup/cygwin/thread.cc
+++ b/winsup/cygwin/thread.cc
@@ -2225,7 +2225,7 @@ pthread_mutex::init (pthread_mutex_t *mutex,
   DWORD waitResult = WaitForSingleObject (mutexInitializationLock, INFINITE);
   if (waitResult != WAIT_OBJECT_0)
     {
-      system_printf ("Received a unexpected wait result on mutexInitializationLock %d, %E\n", waitResult);
+      system_printf ("Received a unexpected wait result on mutexInitializationLock %d, %E", waitResult);
       return EINVAL;
     }