diff --git a/slycot/analysis.py b/slycot/analysis.py
index b8a17441..172eab1c 100644
--- a/slycot/analysis.py
+++ b/slycot/analysis.py
@@ -121,6 +121,11 @@ def ab01nd(n, m, A, B, jobz='N', tol=0, ldwork=None):
     tau : (n, ) ndarray
         The elements of tau contain the scalar factors of the
         elementary reflectors used in the reduction of B and A.
+
+    Raises
+    ------
+    SlycotParameterError
+        :info = -i: the i-th argument had an illegal value;
     """
 
     hidden = ' (hidden by the wrapper)'