diff --git a/lib/matplotlib/lines.py b/lib/matplotlib/lines.py
index 8df89373adf1..35c1a1c75628 100644
--- a/lib/matplotlib/lines.py
+++ b/lib/matplotlib/lines.py
@@ -611,9 +611,7 @@ def set_picker(self, p):
         p : float or callable[[Artist, Event], tuple[bool, dict]]
             If a float, it is used as the pick radius in points.
         """
-        if callable(p):
-            self._contains = p
-        else:
+        if not callable(p):
             self.set_pickradius(p)
         self._picker = p