diff --git a/glotaran/parameter/parameter.py b/glotaran/parameter/parameter.py
index 19941713c..9efd9b0e1 100644
--- a/glotaran/parameter/parameter.py
+++ b/glotaran/parameter/parameter.py
@@ -273,7 +273,7 @@ def full_label(self, full_label: str):
 
     @property
     def non_negative(self) -> bool:
-        r"""Indicate if the parameter is non-negativ.
+        r"""Indicate if the parameter is non-negative.
 
         If true, the parameter will be transformed with :math:`p' = \log{p}` and
         :math:`p = \exp{p'}`.
@@ -285,7 +285,7 @@ def non_negative(self) -> bool:
         Returns
         -------
         bool
-            Whether the parameter is non-negativ.
+            Whether the parameter is non-negative.
         """
         return self._non_negative if self.expression is None else False