diff --git a/src/packaging/markers.py b/src/packaging/markers.py
index 72ff5ead..6201f8d3 100644
--- a/src/packaging/markers.py
+++ b/src/packaging/markers.py
@@ -309,7 +309,6 @@ def evaluate(self, environment: dict[str, str] | None = None) -> bool:
         """
         current_environment = cast("dict[str, str]", default_environment())
         current_environment["extra"] = ""
-        _repair_python_full_version(current_environment)
         if environment is not None:
             current_environment.update(environment)
             # The API used to allow setting extra to None. We need to handle this
@@ -317,15 +316,15 @@ def evaluate(self, environment: dict[str, str] | None = None) -> bool:
             if current_environment["extra"] is None:
                 current_environment["extra"] = ""
 
-        return _evaluate_markers(self._markers, current_environment)
+        return _evaluate_markers(
+            self._markers, _repair_python_full_version(current_environment)
+        )
 
 
 def _repair_python_full_version(env):
     """
     Work around platform.python_version() returning something that is not PEP 440
-    compliant for non-tagged Python builds. Preserve default_environment()'s
-    behavior of returning platform.python_version() verbatim, and leave it to the
-    caller to provide a syntactically valid version if they want to override it.
+    compliant for non-tagged Python builds.
     """
     if env["python_full_version"].endswith("+"):
         env["python_full_version"] += "local"