diff --git a/src/grogu_magn/useful.py b/src/grogu_magn/useful.py
index 6f54c8f..7bd9911 100644
--- a/src/grogu_magn/useful.py
+++ b/src/grogu_magn/useful.py
@@ -154,7 +154,7 @@ def RotMa2b(a, b, eps=1e-10):
 def spin_tracer(M):
     """
     Spin tracer utility.
-    This akes an operator with the orbital-spin sequence:
+    This takes an operator with the orbital-spin sequence:
     orbital 1 up,
     orbital 1 down,
     orbital 2 up,