diff --git a/include/boost/interprocess/detail/os_thread_functions.hpp b/include/boost/interprocess/detail/os_thread_functions.hpp
index c634800..eea4957 100644
--- a/include/boost/interprocess/detail/os_thread_functions.hpp
+++ b/include/boost/interprocess/detail/os_thread_functions.hpp
@@ -491,7 +491,7 @@ inline int thread_create( OS_thread_t * thread, unsigned (__stdcall * start_rout
       return 0;
    }
    else{
-      return EAGAIN;
+      return 1;
    }
 }