diff --git a/eive_tmtc/tmtc/acs/acs_ctrl.py b/eive_tmtc/tmtc/acs/acs_ctrl.py
index 0d11250..68623a3 100644
--- a/eive_tmtc/tmtc/acs/acs_ctrl.py
+++ b/eive_tmtc/tmtc/acs/acs_ctrl.py
@@ -893,6 +893,7 @@ def handle_attitude_estimation_data(pw: PrintWrapper, hk_data: bytes):
         quest_quat = struct.unpack(
             fmt_quat, hk_data[current_idx : current_idx + inc_len_quat]
         )
+        current_idx += inc_len_quat
         pw.dlog(f"{'QUEST Quaternion'.ljust(25)}: {fmt_str_4.format(*quest_quat)}")
         pw.dlog(FsfwTmTcPrinter.get_validity_buffer(hk_data[current_idx:], num_vars=4))
         return