diff --git a/src/x86_64/Ginit.c b/src/x86_64/Ginit.c
index 6e9d4fe..8c102be 100644
--- a/src/x86_64/Ginit.c
+++ b/src/x86_64/Ginit.c
@@ -264,6 +264,24 @@ x86_64_local_addr_space_init (void)
   local_addr_space.acc.get_proc_name = get_static_proc_name;
   unw_flush_cache (&local_addr_space, 0, 0);
 
+#ifdef PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
+  {
+    static const pthread_mutex_t cachelock_init = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
+    local_addr_space.global_cache.lock = cachelock_init;
+  }
+#else
+#pragma weak pthread_mutexattr_init
+#pragma weak pthread_mutexattr_destroy
+#pragma weak pthread_mutex_init
+#pragma weak pthread_mutexattr_settype
+  if (pthread_mutex_init) {
+    pthread_mutexattr_t attr;
+    pthread_mutexattr_init(&attr);
+    pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
+    pthread_mutex_init(&local_addr_space.global_cache.lock, &attr);
+    pthread_mutexattr_destroy(&attr);
+  }
+#endif
   memset (last_good_addr, 0, sizeof (unw_word_t) * NLGA);
   lga_victim = 0;
 }