diff --git a/hosts/sparrow.json b/hosts/sparrow.json
index 3c62b71..3ddf060 100644
--- a/hosts/sparrow.json
+++ b/hosts/sparrow.json
@@ -24,6 +24,9 @@
         "description": "Enable bash completion for the g alias"
       }
     ],
+    "environmentVariables": {
+      "GPG_TTY": "$(tty)"
+    },
     "sessionPaths": [
       {
         "path": "Applications",