diff --git a/src/pthread/once.cpp b/src/pthread/once.cpp
old mode 100755
new mode 100644
index 6e3722a8..50ebf352
--- a/src/pthread/once.cpp
+++ b/src/pthread/once.cpp
@@ -22,12 +22,12 @@ namespace boost
             pthread_key_t epoch_tss_key;
             pthread_once_t epoch_tss_key_flag=PTHREAD_ONCE_INIT;
             
-            extern "C" void delete_epoch_tss_data(void* data)
+            extern "C" static void delete_epoch_tss_data(void* data)
             {
                 free(data);
             }
 
-            extern "C" void create_epoch_tss_key()
+            extern "C" static void create_epoch_tss_key()
             {
                 BOOST_VERIFY(!pthread_key_create(&epoch_tss_key,delete_epoch_tss_data));
             }