diff --git a/bus/activation.c b/bus/activation.c
index ee5efa8..6a44371 100644
--- a/bus/activation.c
+++ b/bus/activation.c
@@ -361,6 +361,8 @@ update_desktop_file_entry (BusActivation       *activation,
                                           _dbus_string_get_const_data (filename));
 
   exec = strdup (_dbus_replace_install_prefix (exec_tmp));
+  dbus_free (exec_tmp);
+  exec_tmp = NULL;
 
   if (entry == NULL) /* New file */
     {
@@ -454,6 +456,7 @@ update_desktop_file_entry (BusActivation       *activation,
 failed:
   dbus_free (name);
   dbus_free (exec_tmp);
+  dbus_free (exec);
   dbus_free (user);
   dbus_free (systemd_service);
   _dbus_string_free (&file_path);