diff --git a/src/poetry/console/commands/env/activate.py b/src/poetry/console/commands/env/activate.py
index dd70275ee52..5f0913fdfaa 100644
--- a/src/poetry/console/commands/env/activate.py
+++ b/src/poetry/console/commands/env/activate.py
@@ -44,7 +44,7 @@ def _get_activate_command(self, env: Env) -> str:
             command, filename = "source", "activate.fish"
         elif shell == "nu":
             command, filename = "overlay use", "activate.nu"
-        elif shell == "csh":
+        elif shell in ["csh", "tcsh"]:
             command, filename = "source", "activate.csh"
         elif shell in ["powershell", "pwsh"]:
             command, filename = ".", "Activate.ps1"
diff --git a/tests/console/commands/env/test_activate.py b/tests/console/commands/env/test_activate.py
index e4b9753e8f0..bea0e6df042 100644
--- a/tests/console/commands/env/test_activate.py
+++ b/tests/console/commands/env/test_activate.py
@@ -28,6 +28,7 @@ def tester(command_tester_factory: CommandTesterFactory) -> CommandTester:
         ("fish", "source", ".fish"),
         ("nu", "overlay use", ".nu"),
         ("csh", "source", ".csh"),
+        ("tcsh", "source", ".csh"),
     ),
 )
 @pytest.mark.skipif(WINDOWS, reason="Only Unix shells")