diff --git a/trio/__init__.py b/trio/__init__.py
index 6e9035d8fd..d517bc7f18 100644
--- a/trio/__init__.py
+++ b/trio/__init__.py
@@ -170,3 +170,10 @@
     __name__ + ".subprocess", _deprecated_subprocess_reexports.__dict__
 )
 del fixup_module_metadata
+
+import sys
+if sys.version_info < (3, 6):
+    _deprecate.warn_deprecated(
+        "Support for Python 3.5", "0.14", issue=75, instead="Python 3.6+"
+    )
+del sys