diff --git a/.gitignore b/.gitignore
index b13e3f4..2a8543c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,6 +6,7 @@ config/*
 config/modules/*
 data/*
 logs/
+templates/.cache/
 
 !config/*.sample
 !config/modules
diff --git a/calefaction/config.py b/calefaction/config.py
index d9ac891..34e9ca4 100644
--- a/calefaction/config.py
+++ b/calefaction/config.py
@@ -73,6 +73,8 @@ class Config:
         """Install relevant config into the application, including modules."""
         app.config["SERVER_NAME"] = self.get("site.canonical")
         app.config["PREFERRED_URL_SCHEME"] = self.scheme
+        app.config["MAKO_MODULE_DIRECTORY"] = str(
+            self._dir.parent / "templates" / ".cache")
         app.secret_key = self.get("auth.session_key")
 
         for module in self.modules: