diff --git a/pypesto/result/optimize.py b/pypesto/result/optimize.py
index 99399163f..8d2742ad9 100644
--- a/pypesto/result/optimize.py
+++ b/pypesto/result/optimize.py
@@ -156,7 +156,7 @@ def summary(self, full: bool = False, show_hess: bool = True) -> str:
             f"* message: {self.message} \n"
             f"* number of evaluations: {self.n_fval}\n"
             f"* time taken to optimize: {self.time:0.3f}s\n"
-            f"* startpoint: {self.x0 if full else self.x0[self.free_indices]}\n"
+            f"* startpoint: {self.x0 if full or self.x0 is None else self.x0[self.free_indices]}\n"
             f"* endpoint: {self.x if full else self.x[self.free_indices]}\n"
         )
         # add fval, gradient, hessian, res, sres if available