Fixes #6095.

tests/stdlib/tjsonmacro.nim

@@ -259,4 +259,20 @@ when isMainModule:
     let data = %*{"name": "foo", "challenge": "bar"}
     let msg = data.to(MsgChallenge)
     doAssert msg.name == "foo"
-    doAssert msg.challenge == "bar"
+    doAssert msg.challenge == "bar"
+
+  block:
+    type
+      Color = enum Red, Brown
+      Thing = object
+        animal: tuple[fur: bool, legs: int]
+        color: Color
+
+    var j = parseJson("""
+      {"animal":{"fur":true,"legs":6},"color":"Red"}
+    """)
+
+    let parsed = to(j, Thing)
+    doAssert parsed.animal.fur
+    doAssert parsed.animal.legs == 6
+    doAssert parsed.color == Red