diff --git a/src/libstore/db.cc b/src/libstore/db.cc
index 8c0678d0e8..e792a371b8 100644
--- a/src/libstore/db.cc
+++ b/src/libstore/db.cc
@@ -146,6 +146,12 @@ void openEnv(DbEnv * env, const string & path, u_int32_t flags)
 }
 
 
+static int my_fsync(int fd)
+{
+    return 0;
+}
+
+
 void Database::open(const string & path)
 {
     if (env) throw Error(format("environment already open"));
@@ -164,6 +170,8 @@ void Database::open(const string & path)
         env->set_lk_detect(DB_LOCK_DEFAULT);
         env->set_flags(DB_TXN_WRITE_NOSYNC | DB_LOG_AUTOREMOVE, 1);
         
+        db_env_set_func_fsync(my_fsync);
+        
 
         /* The following code provides automatic recovery of the
            database environment.  Recovery is necessary when a process