diff --git a/src/filters.py b/src/filters.py
index bcd2c09577b44ab65708283756c8eddaf7c7f15a..77b75ec4e973989ec12249a5fb3dcfbf361bc2f9 100644
--- a/src/filters.py
+++ b/src/filters.py
@@ -77,6 +77,9 @@ class IMM:
     def __init__(self, filters, sensor_model, transition_prob):
         """An implementation of an Interacting Multiple Model filter.
 
+        NOTE: Not a good implementation in the sense that it needs a specialized
+        tracker implementation to actually be useable, see src.trackers.IMMTracker.
+
         Parameters
         ----------
         filters : list