diff --git a/core_updater_list.c b/core_updater_list.c
index 34e3a7cd06..994fed947a 100644
--- a/core_updater_list.c
+++ b/core_updater_list.c
@@ -729,6 +729,7 @@ bool core_updater_list_parse_network_data(
 
    /* Temporary data buffer is no longer required */
    free(data_buf);
+   data_buf = NULL;
 
    /* Loop over lines */
    for (i = 0; i < network_core_list->size; i++)