diff --git a/rocketpy/mathutils/function.py b/rocketpy/mathutils/function.py
index f0ed22191..159723f2e 100644
--- a/rocketpy/mathutils/function.py
+++ b/rocketpy/mathutils/function.py
@@ -138,7 +138,7 @@ def set_source(self, source):
 
             - Python function: Called for evaluation with input values.
 
-            - int or float: Treated as a constant value.
+            - int or float: Treated as a constant value function.
 
             - ndarray: Used for interpolation. Format as [(x0, y0, z0),
             (x1, y1, z1), ..., (xn, yn, zn)], where 'x' and 'y' are inputs,