diff --git a/src/poetry/utils/shell.py b/src/poetry/utils/shell.py
index 7c9b23e58ee..d5b23288540 100644
--- a/src/poetry/utils/shell.py
+++ b/src/poetry/utils/shell.py
@@ -76,14 +76,13 @@ def activate(self, env: VirtualEnv) -> int | None:
         # mypy requires using sys.platform instead of WINDOWS constant
         # in if statements to properly type check on Windows
         if sys.platform == "win32":
+            args = None
             if self._name in ("powershell", "pwsh"):
                 args = ["-NoExit", "-File", str(activate_path)]
             elif self._name == "cmd":
                 # /K will execute the bat file and
                 # keep the cmd process from terminating
                 args = ["/K", str(activate_path)]
-            else:
-                args = None
 
             if args:
                 completed_proc = subprocess.run([self.path, *args])