diff --git a/eive_tmtc/tmtc/acs/star_tracker.py b/eive_tmtc/tmtc/acs/star_tracker.py
index 5b26110..bbbf3e1 100644
--- a/eive_tmtc/tmtc/acs/star_tracker.py
+++ b/eive_tmtc/tmtc/acs/star_tracker.py
@@ -732,7 +732,7 @@ def handle_solution_set(hk_data: bytes, pw: PrintWrapper):
     current_idx += 1
     # Result of LISA: Lost in space algorithm
     lisa_fmt = "!fffffB"
-    fmt_len = struct.calcsize(track_fmt)
+    fmt_len = struct.calcsize(lisa_fmt)
     (lisa_q_w, lisa_q_x, lisa_q_y, lisa_q_z, lisa_percentage_close_stars, lisa_number_close_stars) = struct.unpack(
         lisa_fmt, hk_data[current_idx: current_idx + fmt_len]
     )
@@ -746,7 +746,7 @@ def handle_solution_set(hk_data: bytes, pw: PrintWrapper):
     is_trusworthy = hk_data[current_idx]
     pw.dlog(f"Trustworthy solution: {is_trusworthy}")
     current_idx += 1
-    stable_count = struct.unpack("!I", hk_data[current_idx: current_idx + 4])
+    stable_count = struct.unpack("!I", hk_data[current_idx: current_idx + 4])[0]
     pw.dlog(f"Stable count: {stable_count}")
     current_idx += 4
     solution_strategy = hk_data[current_idx]