diff --git a/src/poetry/utils/shell.py b/src/poetry/utils/shell.py
index 8d81fde353d..a6ba480740d 100644
--- a/src/poetry/utils/shell.py
+++ b/src/poetry/utils/shell.py
@@ -103,6 +103,8 @@ def _get_activate_script(self) -> str:
             suffix = ".fish"
         elif self._name in ("csh", "tcsh"):
             suffix = ".csh"
+        elif self._name == "pwsh":
+            suffix = ".ps1"
         else:
             suffix = ""