diff --git a/src/mod/event_handlers/mod_kazoo/kazoo_fetch_agent.c b/src/mod/event_handlers/mod_kazoo/kazoo_fetch_agent.c
index f2fe47e54e..24d4358b7e 100644
--- a/src/mod/event_handlers/mod_kazoo/kazoo_fetch_agent.c
+++ b/src/mod/event_handlers/mod_kazoo/kazoo_fetch_agent.c
@@ -184,7 +184,7 @@ static switch_xml_t fetch_handler(const char *section, const char *tag_name, con
 	switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "Fetch-Key-Name", key_name);
 	switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "Fetch-Key-Value", key_value);
 	switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Fetch-Timeout", "%u", profile->fetch_timeout);
-	switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Fetch-Timestamp-Micro", "%ld", (uint64_t)now);
+	switch_event_add_header(event, SWITCH_STACK_BOTTOM, "Fetch-Timestamp-Micro", "%" SWITCH_UINT64_T_FMT, (uint64_t)now);
 	switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "Kazoo-Version", VERSION);
 	switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "Kazoo-Bundle", BUNDLE);
 	switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "Kazoo-Release", RELEASE);