diff --git a/src/sage/matrix/matrix2.pyx b/src/sage/matrix/matrix2.pyx
index 99b0ffa33ac..ffe51df753e 100644
--- a/src/sage/matrix/matrix2.pyx
+++ b/src/sage/matrix/matrix2.pyx
@@ -3485,6 +3485,7 @@ cdef class Matrix(Matrix1):
                 for k in range(p):
                     s = s - A[k] * F[p-k-1]
                 F[p] = s - A[p]
+                sig_check()
 
         X = S.gen(0)
         f = X**n + S(list(reversed(F)))