diff --git a/src/cpp11_thread.cpp b/src/cpp11_thread.cpp
index 1f5dd4d2b..071c013a1 100644
--- a/src/cpp11_thread.cpp
+++ b/src/cpp11_thread.cpp
@@ -42,7 +42,7 @@ thread_wait(thread_t *arg, int timeout)
 mutex_t *
 thread_create_mutex(void)
 {
-    auto mutex = new std::recursive_mutex;
+    auto mutex = new std::mutex;
     return mutex;
 }
 
@@ -51,7 +51,7 @@ thread_wait_mutex(mutex_t *_mutex)
 {
     if (_mutex == nullptr)
         return(0);
-    auto mutex = reinterpret_cast<std::recursive_mutex*>(_mutex);
+    auto mutex = reinterpret_cast<std::mutex*>(_mutex);
     mutex->lock();
     return 1;
 }
@@ -62,7 +62,7 @@ thread_release_mutex(mutex_t *_mutex)
 {
     if (_mutex == nullptr)
         return(0);
-    auto mutex = reinterpret_cast<std::recursive_mutex*>(_mutex);
+    auto mutex = reinterpret_cast<std::mutex*>(_mutex);
     mutex->unlock();
     return 1;
 }
@@ -71,7 +71,7 @@ thread_release_mutex(mutex_t *_mutex)
 void
 thread_close_mutex(mutex_t *_mutex)
 {
-    auto mutex = reinterpret_cast<std::recursive_mutex*>(_mutex);
+    auto mutex = reinterpret_cast<std::mutex*>(_mutex);
     delete mutex;
 }