diff --git a/pus_tm/hk_handling.py b/pus_tm/hk_handling.py
index efdacb5..4f00116 100644
--- a/pus_tm/hk_handling.py
+++ b/pus_tm/hk_handling.py
@@ -28,7 +28,7 @@ def handle_user_hk_packet(object_id: bytes, set_id: int, hk_data: bytearray,
         else:
             LOGGER.info("Serive 3 TM: Syrlinks handler reply with unknown set id")
             return [], [], bytearray(), 0
-    elif object_id == GPS_HANDLER_0_ID or object_id == GPS_HANDLER_1_ID
+    elif object_id == GPS_HANDLER_0_ID or object_id == GPS_HANDLER_1_ID:
         return handle_gps_data(hk_data=hk_data)
     else:
         LOGGER.info("Service 3 TM: Parsing for this SID has not been implemented.")
@@ -141,5 +141,6 @@ def handle_self_test_data(hk_data: bytearray) -> Tuple[list, list, bytearray, in
     return hk_header, hk_content, validity_buffer, len(hk_header)
 
 
-def handle_gps_data(hk_data: bytearray):
+def handle_gps_data(hk_data: bytearray) -> Tuple[list, list, bytearray, int]:
     LOGGER.info('Received GPS data')
+    return [], [], bytearray(), 0
diff --git a/tmtccmd b/tmtccmd
index 51619f4..87af3df 160000
--- a/tmtccmd
+++ b/tmtccmd
@@ -1 +1 @@
-Subproject commit 51619f4724b443a1ce0b5949dd1c1eb9c9eaead0
+Subproject commit 87af3df9fb9860bf12b70bf2eff503a468a893de